Composite Spinner Field Maintenance and Minor...

Composite Spinner Field Maintenance and Minor Repair Manual

Composite Spinner Assemblies

Hartzell Propeller Inc.One Propeller PlacePiqua, Ohio 45356-2634 U.S.A.Phone: 937.778.4200Fax: 937.778.4215

Manual No. 17361-10-73Revision 7May 2017

D-5253 105085( )D-5311-( ) 105127( )D-5362 105656( ) (hybrid)E-5579-6 105675 (hybrid)D-7409-( ) 105945( ) (hybrid)E-7480 106040( ) (hybrid)101298 (hybrid) 106188( ) (hybrid)102870( ) 106215( ) (hybrid)103409( ) (hybrid) 106311( )103585( ) (hybrid) 106574( ) (hybrid)103629( ) (hybrid) 106848( ) (hybrid)104529 106871( ) (hybrid)104888-( ) (hybrid) 106957( )

Inside Cover Rev. 7 May/1761-10-73COVER

COMPOSITE SPINNER FIELD MAINTENANCE AND MINOR REPAIR MANUAL

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© 1997, 2004, 2007, 2008, 2010, 2013, 2014, 2015, 2016, 2017 - Hartzell Propeller Inc. - All rights reserved


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Page 1 Rev. 7 May/17

61-10-73REVISION HIGHLIGHTS

REVISION 7 HIGHLIGHTS

• COVER

• Revised to match the manual revision

• REVISION HIGHLIGHTS


• LIST OF EFFECTIVE PAGES


• REPAIR LIMITS

• Revised the check criteria for the Dome in Table 1-1, "Repair Limits by Damage Type"

• MINOR REPAIR

• Revised Table 2-1, "Spinner Repair Materials" • Revised Figure 2-2, "UHMW Tape CM137" • Revised Table 2-2, "Nutplates and Rivets That Can Be Replaced"

• FINISH PROCEDURES

• Revised Table 3-1, "Finish Procedures" • Added the section, "Paint Removal" • Revised the section, "Masking" • Revised the section, "Primer Filler (Mixture Number 1)" • Revised the section, "Minor Blemish Correction" • Revised the section, "Primer Sealer (Mixture Number 2)" • Revised the section, "Finish Paint" • Revised the section, "Paint Inspection" • Revised Figure 3-1, "Resistance Check of the Dome" • Revised Figure 3-3, "Resistance Check of the Bulkhead" • Revised Table 3-4, "Resistance Check of the Bulkhead" • Revised Figure 3-4, "Resistance Check of the Fairing Unit" • Made other language/format changes


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Page 2 Rev. 7 May/17

61-10-73REVISION HIGHLIGHTS

REVISION HIGHLIGHTS

1. Introduction

A. General

(1) This is a list of current revisions that have been issued against this manual. Please compare to the RECORD OF REVISIONS page to make sure that all revisions have been added to the manual.

B. Components

(1) Revision No. indicates the revisions incorporated in this manual.

(2) Issue Date is the date of the revision.

(3) Comments indicates the level of the revision.

(a) New Issue is a new manual distribution. The manual is distributed in its entirety. All the revision dates are the same and no change bars are used.

(b) Reissue is a revision to an existing manual that includes major content and/or major format changes. The manual is distributed in its entirety. All the revision dates are the same and no change bars are used.

(c) Major Revision is a revision to an existing manual that includes major content or minor format changes over a large portion of the manual. The manual is distributed in its entirety. All the revision dates are the same, but change bars are used to indicate the changes incorporated in the latest revision of the manual.

(d) Minor Revision is a revision to an existing manual that includes minor content changes to the manual. Only the revised pages of the manual are distributed. Each page retains the date and the change bars associated with the last revision to that page.

Revision No. Issue Date Comments

Original Sep/14 New Issue Rev. 1 Dec/14 Minor Revision Rev. 2 Oct/15 Minor Revision Rev. 3 Dec/15 Minor Revision Rev. 4 Aug/16 Minor Revision Rev. 5 Sep/16 Minor Revision Rev. 6 Nov/16 Minor Revision Rev. 7 May/17 Minor Revision

RECORD OF REVISIONS

This is a permanent historical record of revisions inserted into this manual.

RECORD OF REVISIONS 61-10-73 Page 1Sep/14


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Revision Number

Issue Date

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1 Dec/14 Dec/14 HPI

2 Oct/15 Oct/15 HPI

3 Dec/15 Dec/15 HPI

4 Aug/16 Aug/16 HPI

5 Sep/16 Sep/16 HPI

6 Nov/16 Nov/16 HPI

7 May/17 May/17 HPI

Revision Number

Issue Date

Date Inserted

Inserted By

RECORD OF REVISIONS

This is a permanent historical record of revisions inserted into this manual.

Page 2Sep/14

61-10-73RECORD OF REVISIONS


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Revision Number

Issue Date

Date Inserted

Inserted By

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Date Inserted

Inserted By

Sep/14

RECORD OF TEMPORARY REVISIONS 61-10-73


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RECORD OF TEMPORARY REVISIONS

Update this page to show all Temporary Revisions inserted into this manual.

TemporaryRevision No.

Section/Page

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DateInserted

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RemovedBy

Sep/14

SERVICE DOCUMENT LIST

CAUTION 1: DO NOT USE OBSOLETE OR OUTDATED INFORMATION. PERFORM ALL INSPECTIONS OR WORK IN ACCORDANCE WITH THE MOST RECENT REVISION OF THE SERVICE DOCUMENT. INFORMATION CONTAINED IN A SERVICE DOCUMENT MAY BE SIGNIFICANTLY CHANGED FROM EARLIER REVISIONS. FAILURE TO COMPLY WITH INFORMATION CONTAINED IN A SERVICE DOCUMENT OR THE USE OF OBSOLETE INFORMATION MAY CREATE AN UNSAFE CONDITION THAT MAY RESULT IN DEATH, SERIOUS BODILY INJURY, AND/OR SUBSTANTIAL PROPERTY DAMAGE.

CAUTION 2: THE INFORMATION FOR THE DOCUMENTS LISTED INDICATES THE REVISION LEVEL AND DATE AT THE TIME THAT THE DOCUMENT WAS INITIALLY INCORPORATED INTO THIS MANUAL. INFORMATION CONTAINED IN A SERVICE DOCUMENT MAY BE SIGNIFICANTLY CHANGED FROM EARLIER REVISIONS. REFER TO THE APPLICABLE SERVICE DOCUMENT INDEX FOR THE MOST RECENT REVISION LEVEL OF THE SERVICE DOCUMENT.

61-10-73SERVICE DOCUMENT LIST


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Service Document Number

IncorporationRev./Date



Sep/14

SERVICE DOCUMENT LIST

61-10-73SERVICE DOCUMENT LIST


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Sep/14

61-10-73AIRWORTHINESS LIMITATIONS


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AIRWORTHINESS LIMITATIONS

1. Airworthiness Limitations Information

A. For airworthiness limitations information, refer to the applicable Hartzell Propeller Inc. owner's manual.

Sep/14

61-10-73AIRWORTHINESS LIMITATIONS


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(This page is intentionally blank.)

Rev. 7 May/17

LIST OF EFFECTIVE PAGES 61-10-73

LIST OF EFFECTIVE PAGES

Chapter Page Rev. Level Date


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Cover and Inside Cover Cover and Inside Cover Rev. 7 May/17Revision Highlights 1 and 2 Rev. 7 May/17Record of Revisions 1 and 2 Original Sep/14Record of Temporary Revisions 1 and 2 Original Sep/14Service Document List 1 and 2 Original Sep/14Airworthiness Limitations 1 and 2 Original Sep/14List of Effective Pages 1 and 2 Rev. 7 May/17Table of Contents 1 and 2 Original Sep/14Introduction 1 and 2 Original Sep/14Introduction 3 Rev. 4 Aug/16Introduction 4 Original Sep/14Introduction 5 Rev. 2 Oct/15Introduction 6 Rev. 4 Aug/16Introduction 7 thru 14 Original Sep/14Repair Limits 1-1 thru 1-6 Original Sep/14Repair Limits 1-7 thru 1-9 Rev. 7 May/17Repair Limits 1-10 thru 1-18 Original Sep/14Repair Limits 1-19 and 1-20 Rev. 4 Aug/16Minor Repair 2-1 thru 2-3 Original Sep/14Minor Repair 2-4 Rev. 4 Aug/16Minor Repair 2-4.1 Rev. 4 Aug/16Minor Repair 2-4.2 Rev. 7 May/17Minor Repair 2-5 Rev. 7 May/17Minor Repair 2-6 and 2-7 Original Sep/14Minor Repair 2-8 Rev. 7 May/17Minor Repair 2-9 thru 2-22 Original Sep/14Minor Repair 2-23 Rev. 3 Dec/15Minor Repair 2-24 Rev. 4 Aug/16Minor Repair 2-25 Rev. 7 May/17Minor Repair 2-26 thru 2-32 Original Sep/14Finish Procedures 3-1 thru 3-44 Rev. 7 May/17Tooling 4-1 thru 4-4 Original Sep/14

Rev. 7 May/17

LIST OF EFFECTIVE PAGES 61-10-73


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Page 1 TABLE OF CONTENTS 61-10-73 Sep/14

TABLE OF CONTENTS

REVISION HIGHLIGHTS .................................................................................................1RECORD OF REVISIONS ...............................................................................................1RECORD OF TEMPORARY REVISIONS ........................................................................1SERVICE DOCUMENT LIST............................................................................................1AIRWORTHINESS LIMITATIONS ....................................................................................1LIST OF EFFECTIVE PAGES ..........................................................................................1TABLE OF CONTENTS ....................................................................................................1INTRODUCTION ..............................................................................................................1REPAIR LIMITS .............................................................................................................1-1MINOR REPAIR ............................................................................................................2-1FINISH PROCEDURES ................................................................................................3-1TOOLING ......................................................................................................................4-1


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Page 2 TABLE OF CONTENTS 61-10-73 Sep/14



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Page 1Sep/1461-10-73INTRODUCTION

INTRODUCTION - CONTENTS

1. Statement of Purpose ....................................................................................................3A. General ....................................................................................................................3

2. Required Publications ....................................................................................................5A. Hartzell Propeller Inc. Publications ..........................................................................5B. References to Hartzell Propeller Inc. Publications ...................................................6C. Vendor Publications .................................................................................................6

3. Personnel Requirements................................................................................................7A. Inspection, Repair, and Overhaul .............................................................................7

4. Safe Handling of Paints and Chemicals .........................................................................75. Component Life and Service ..........................................................................................7

A. Overhaul ..................................................................................................................7B. Damage ...................................................................................................................9C. Repair ......................................................................................................................9D. Component Life ......................................................................................................11

6. Determination of Repair ...............................................................................................117. Definitions ....................................................................................................................128. Abbreviations ...............................................................................................................13

LIST OF FIGURES

Determination of Repair Flow Chart ........................................Figure 1 ............................10


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Page 3Rev. 4 Aug/1661-10-73INTRODUCTION

1. Statement of PurposeA. General

(1) This manual has been reviewed and accepted by the FAA. Additionally, this manual contains data that has been approved in a manner acceptable to the FAA Administrator.

(2) Thismanualprovidesfieldmaintenanceandminorrepairproceduresforcomposite spinner assemblies manufactured by Hartzell Propeller Inc. The text throughout this manual assumes that the spinner has been removed from the propeller assembly, except for certain minor repairs that often can be performed on the aircraft.

(3) Contact the Product Support Department of Hartzell Propeller Inc. about any maintenance problems or to request information not included in this publication.NOTE: When calling from outside the United States, dial (001) before dialing

the telephone numbers listed below.

(a) Hartzell Propeller Inc. Product Support may be reached during business hours (8:00 a.m. through 5:00 p.m., United States Eastern Time) at (937) 778-4379 or at (800) 942-7767, toll free from the United States and Canada.

(b) Hartzell Propeller Inc. Product Support can also be reached by fax at (937) 778-4215, and by e-mail at [email protected].

(c) After business hours, you may leave a message on our 24 hour product support line at (937) 778-4376 or at (800) 942-7767, toll free from the United States and Canada. A technical representative will contact you during normal business hours. Urgent AOG support is also available 24 hours per day, seven days per week via this message service.

(d) Additional information is available on the Hartzell Propeller Inc. website at www.hartzellprop.com.

(4) Thismanualistobeusedbycertifiedairframemechanicswhoarefamiliarwithcomposite products. (a) This manual does not provide complete information for composite spinner

Major Repairs. For personnel authorized to perform Major Repairs refer to the Personnel Requirements section of this chapter.

(5) Thismanualisintendedtobeasourceoffieldinspectionandminorrepairfor composite spinner assemblies. Information published in Service Bulletins, Service Letters, Service Advisories, and Service Instructions may supersede information published in this manual. The reader must consult active Service Bulletins, Service Letters, Service Advisories, and Service Instructions for information that may not yet have been incorporated into the latest revision of this manual.

(6) Some components of a composite spinner may be metal. This manual only gives instructions for the overhaul of the composite components. For overhaul of the metal components, refer to Hartzell Propeller Inc. Metal Spinner Maintenance Manual 127 (61-16-27).


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(7) Wherepossible,thismanualiswrittenintheformatspecifiedbyATAiSpec 2200.

(8) This manual is not arranged sequentially in steps of the inspection and repair process.

NOTE: Unlessotherwisespecified,thetextofthismanualaddressesallcomposite spinner models.


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Page 5Rev. 2 Oct/1561-10-73INTRODUCTION

2. Required Publications

A. Hartzell Propeller Inc. Publications(1) In addition to this manual, one or more of the following publications are

requiredforinformationregardingspecificrecommendationsandprocedurestomaintain spinner assemblies.

(2) Information published in Service Bulletins, Service Letters, Service Advisories, and Service Instructions may supersede information published in this manual. The reader must consult active Service Bulletins, Service Letters, Service Advisories, and Service Instructions for information that may have not yet been incorporated into the latest revision of this manual.

Manual No. ATA No. Title

n/a n/a Active Hartzell Propeller Inc. Service Bulletins, Service Letters, Service Instructions, and Service Advisories

127 61-16-27 Hartzell Propeller Inc. Metal Spinner Maintenance Manual (Available on the Hartzell Propeller Inc. website at www.hartzellprop.com.)148 61-16-48 Hartzell Propeller Inc. Composite Spinner Maintenance Manual 159 61-02-59 Hartzell Propeller Inc. Application Guide (Available on the Hartzell Propeller Inc. website at www.hartzellprop.com.)165A 61-00-65 Hartzell Propeller Inc. Illustrated Tool and Equipment Manual (Available on the Hartzell Propeller Inc. website at www.hartzellprop.com.)180 30-61-80 Hartzell Propeller Inc. Propeller Ice Protection System Manual (Available on the Hartzell Propeller Inc. website at www.hartzellprop.com.)181 30-60-81 Hartzell Propeller Inc. Propeller Ice Protection System Component Maintenance Manual (Available on the Hartzell Propeller Inc. website at www.hartzellprop.com.)182 61-12-82 Hartzell Propeller Inc. Propeller Electrical De-ice Boot Removal and Installation Manual (Available on the Hartzell Propeller Inc. website at www.hartzellprop.com.)


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Page 6Rev. 4 Aug/1661-10-73INTRODUCTION

183 61-12-83 Hartzell Propeller Inc. Propeller Anti-icing Boot Removal and Installation Manual (Available on the Hartzell Propeller Inc. website at www.hartzellprop.com.)202A 61-01-02 Hartzell Propeller Inc. Standard Practices Manual (Volume 7 - Consumable Materials and Packaging and Storage is available on the Hartzell Propeller Inc. website at www.hartzellprop.com.

(3) Refer to the applicable propeller owner's manual for Airworthiness Limitations.

(4) Refer to the applicable propeller owner's manual for on-line maintenance procedures, i.e., maintenance inspection.

(5) For Hartzell Propeller Inc. service literature and revisions, contact:

Hartzell Propeller Inc. Telephone: 937.778.4200 Attn: Technical Publications Department Fax: 937.778.4215 One Propeller Place E-mail: [email protected] Piqua, Ohio 45356-2634 U.S.A.

(a) Selected information is also available on the Hartzell Propeller Inc. website at www.hartzellprop.com.

B. References to Hartzell Propeller Inc. Publications

(1) Special tooling may be required for procedures in this manual. For further tooling information, refer to Hartzell Propeller Inc. Illustrated Tool and Equipment Manual 165A (61-00-65).

(a) Thereferencenumbersfortoolingappearwiththeprefix"TE"directlyfollowing the tool name to which they apply. For example, a template that is reference number 133 will appear as: template TE133.

(2) Consumable materials are referenced in certain sections throughout this manual.SpecificapprovedmaterialsarelistedintheConsumableMaterialschapter of Hartzell Propeller Inc. Standard Practices Manual 202A (61-01-02).

(a) Thereferencenumbersforconsumablematerialsappearwiththeprefix"CM"directlyfollowingthematerialtowhichtheyapply.Forexample,anadhesive that is reference number 16 will appear as: adhesive CM16. Onlythoseitemsspecifiedmaybeused.

C. Vendor Publications

(1) None.


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3. Personnel Requirements

A. Inspection, Repair, and Overhaul

(1) Compliance to the applicable regulatory requirements established by the Federal Aviation Administration (FAA) or international equivalent, is mandatory for anyone performing or accepting responsibility for any inspection and/or repair of any Hartzell Propeller Inc. product.

(2) Inspection and repair of a composite spinner requires a high degree of skill; therefore, personnel with inspection and supervisory responsibility are expected to have all of the following:(a) AnFAAAirframeMechanicCertificateorinternationalequivalent(b) A minimum of 18 months practical experience with Hartzell Propeller Inc.

composite spinner overhaul(3) Any person signing for or performing inspections, repairs and/or

overhaul/major repairs to Hartzell Propeller Inc. composite parts should be very familiar with the objectives and procedures associated with inspecting, repair and/or overhaul of composite parts.

(a) It is strongly recommended that the individuals taking the responsibilities for or performing the tasks of inspecting, repairing and/or overhauling of composite parts be familiar with working with composite materials.

4. Safe Handling of Paints and ChemicalsA. Always use caution when handling or being exposed to paints and/or chemicals

during propeller overhaul and maintenance procedures.B. Before using paint or chemicals, always read the manufacturer’s label on the

containerandfollowspecifiedinstructionsandproceduresforstorage,preparation,mixing, and application.

C. Refer to the product’s Material Safety Data Sheet (MSDS) for detailed information about physical properties, health, and physical hazards of any chemical.

5. Component Life and Service

A. Overhaul/Major Repairs

(1) Overhaul/Major Repairs is the periodic disassembly, cleaning, inspecting, repairing as necessary, reassembling, and testing in accordance with approved standards and technical data approved by Hartzell Propeller Inc.

(2) TheOverhaul/MajorRepairsintervalisbasedonhoursofservice,i.e.,flighttime, or on calendar time.

(a) Atsuchspecifiedperiods,thespinnerassemblyshouldbecompletelydisassembled and inspected for cracks, wear, corrosion, and other unusual or abnormal conditions.


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(b) Parts that are not replaced at overhaul must be inspected in accordance with the Repair Limits chapter of this manual.

1 Partsthatmustbereplacedatoverhaulareidentifiedbya"Y"inthe O/H column of the Illustrated Parts List chapter of the Hartzell Propeller Inc. Composite Spinner Maintenance Manual 148 (61-16-48). For personnel authorized to perform Overhaul/Major Repairs refer to the Personnel Requirements section of this chapter.

WARNING: DO NOT USE OBSOLETE OR OUTDATED INFORMATION. PERFORM ALL INSPECTIONS OR WORK IN ACCORDANCE WITH THE MOST RECENT REVISION OF THIS MANUAL. INFORMATION CONTAINEDINTHISMANUALMAYBESIGNIFICANTLYCHANGED FROM EARLIER REVISIONS. FAILURE TO COMPLYWITHTHISMANUALORTHE USE OF OBSOLETE INFORMATIONMAYCREATEANUNSAFECONDITIONTHATMAYRESULTINDEATH,SERIOUSBODILYINJURY,AND/ORSUBSTANTIALPROPERTYDAMAGE.FOR THE MOST RECENT REVISION LEVEL OF THIS MANUAL, REFER TO THE HARTZELL PROPELLER INC. WEBSITE AT WWW.HARTZELLPROP.COM.

(3) Overhaul/Major Repairs must be completed in accordance with the latest revision of the applicable component maintenance manual and other publications applicable to, or referenced in, the Hartzell Propeller Inc. Composite Spinner Maintenance Manual 148 (61-16-48).

(4) The information in this manual supersedes data in all previously published revisions of this manual.


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B. Damage(1) Airworthy Damage

(a) Airworthydamageisaspecificconditiontoapropellercomponentidentifiedin the Repair Limits chapter 1 of this manual that does not affect the safety orflightcharacteristicsofthespinnerassemblyandconformstoitstypedesign by meeting the condition inspection criteria limitations found in this manual.

1 ThemaximumlimitsofairworthydamagearespecifiedintheRepairLimits chapter 1 of this manual.

a TheRepairLimitschapter1inthismanualspecifiesinspectioncriteria and instructions for evaluating damage to determine continued airworthiness.

b Although a spinner may continue in service with airworthy damage, this type of damage should be repaired at the earliest practical time to prevent further damage to the system.

(2) Unairworthy Damage

(a) Unairworthy damage is damage that exceeds the airworthy damage limits asspecifiedintheRepairLimitschapter1ofthismanual.1 Unairworthydamagecanaffectthesafetyorflightcharacteristicsof

the spinner assembly and does not conform to its type design.

2 This condition deems the component unairworthy, requiring appropriate corrective action to repair or remove it from service, as applicable. Exceptions to this policy may be possible, but require written authorization from Hartzell Propeller Inc.

C. Repair(1) Minor Repair

(a) Minorrepairisthatwhichmaybedonesafelyinthefieldbyacertifiedaircraft mechanic.

(2) Major Repair

(a) Major repair is correction of damage that cannot be done by elementary operations.

(b) MajorrepairworkmustbeacceptedbyanindividualthatiscertifiedbytheFederal Aviation Administration (FAA) or international equivalent.

1 The servicing facility must meet facility, tooling, and personnel requirements.


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Determination of Repair Flow ChartFigure 1

Airworthydefined in

this chapter

Unairworthydefined in

this chapter

Examination of

DamagedSpinner

MinorRepair

defined in this chapter

FactoryRepair

exceedsminor and

major repair

Major Repair

defined inthis chapter


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D. Component Life

(1) Component life is expressed in terms of hours of service (Time Since New, TSN) and in terms of hours of service since overhaul (Time Since Overhaul, TSO).

NOTE: TSN/TSO is considered as the time accumulated between rotation andlanding,i.e.,flighttime.

(2) BothTSNandTSOarenecessaryfordefiningthelifeofthecomponent.Somepartsare"lifelimited,"whichmeansthattheymustbereplacedafteraspecifiedperiod of use (TSN).

(3) When a component or assembly undergoes an overhaul, the TSO is returned to zero hours.

(a) Time Since New (TSN) can never be returned to zero.

(b) Repair without overhaul does not affect TSO or TSN.

(4) Time Since New (TSN) and Time Since Overhaul (TSO) records must be maintained in the propeller logbook.

6. Determination of Repair

A. This manual is arranged such that damage and repair are treated separately. This givestheoperatorsandrepairfacilitiesgreaterclarificationandfreedomindealingwith composite spinner damage.

(1) Thischapterdefinesairworthydamageandminorrepair.TheRepairLimitschapter lists the allowables for airworthy damage.

(2) DamagethatisgreaterthantheallowablesspecifiedintheRepairLimitschapter is considered unairworthy.

(3) The type of repair is not dictated by the type of damage received. For example, a spinner with airworthy damage may require a major repair.

B. Uponinspectionofacompositespinner,anoperatorshouldfirstdeterminethetypeof damage: airworthy or unairworthy. (Limits are in the Repair Limits chapter.) Figure 1 illustrates the determination of repair.

(1) If the damage is determined to be airworthy, the aircraft may continue in service; however, the operator should make arrangements to have repairs performed as soon as practical.

(2) If the damage is determined to be unairworthy, the spinner cannot be used until a repair is performed. Exceptions to this policy may be possible, but require written authorization from Hartzell Propeller Inc.

C. The operator should determine if the repair falls into the category of minor or major.

D. Becauseoftheinfinitetypesofdamagepossible,notalltypesofdamagethatcanbe considered airworthy are included in this manual. If there is any doubt as to airworthiness of the spinner, contact Hartzell Propeller Inc.


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7. Definitions Term Definition

Composite Material ......Kevlar®(yellow)orgraphite(black)fibersboundtogetherwithorencapsulated within an epoxy resin.

Corrosion......................Gradual wearing away or deterioration due to chemical action.Crack ............................Irregularly shaped separation within a material, usually visible as

a narrow opening at the surface.Debond.........................Separation of two materials that were originally bonded together

in a separate operation.Delamination ................Internal separation of the layers of composite material.Depression ...................Surface area where the material has been compressed but not

removed.Distortion ......................Alteration of the original shape or size of a component.Erosion .........................Gradual wearing away or deterioration due to action of the

elements.Exposure ......................Leaving material open to action of the elements.Gouge ..........................Surface area where material has been removed. Impact Damage ............Occurs when the component strikes or is struck by an object,

eitherin-flightorontheground.Nick ..............................Removal of paint and possibly a small amount of composite

material not exceeding one layer, typically 0.010 inch (0.25 mm)Overhaul.......................The periodic disassembly, inspection, reconditioning, and

reassembly of a component.Pitting ...........................Formation of a number of small, irregularly shaped cavities in

surface material caused by corrosion, erosion or fretting.Porosity ........................An aggregation of microvoids. See “Voids.”Scratch .........................Same as “Nick.”Split ..............................Delamination of spinner extending to a surface, such as a blade

cutout or trimline.Trimline ........................Factory terminology referring to where the part was trimmed to

length.Voids ............................Air or gas that has been trapped and cured into a laminate or

adhesive.


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8. Abbreviations

Abbreviation Term

AN ...........................Army-Navy AOG ........................Aircraft On Ground ATA ..........................Air Transport Association FAA .........................Federal Aviation Administration Ft-Lb .......................Foot-Pound ID ............................Inside Diameter In-Lb ........................Inch-Pound IPL ...........................Illustrated Parts List Lbs ..........................Pounds MIL-X-XXX ..............MilitarySpecification MPI .........................Major Periodic Inspection MS ..........................Military Standard OD ..........................Outside Diameter NAS ........................National Aircraft Standards N•m .........................Newton-Meter PSI ..........................Pounds per Square Inch RPM ........................Revolutions per Minute TBO ........................Time Between Overhaul (T)TSN ....................(Total) Time Since New TSO ........................Time Since Overhaul


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1 REPAIR LIMITS 61-10-73 Sep/14


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LIST OF TABLES

REPAIR LIMITS - CONTENTS

LIST OF FIGURES

Coin-Tap Inspection .............................................................................. Figure 1-1 ............. 1-4

Crack at the Blade Cutout .................................................................... Figure 1-2 ............. 1-6

Crushed or Missing Material at the OD Trimline ................................... Figure 1-3 ........... 1-10

Filler Plate............................................................................................. Figure 1-4 ........... 1-14

Fairing Unit ........................................................................................... Figure 1-5 ........... 1-16

Repair Limits by Damage Type .............................................................Table 1-1 ............. 1-7

1. Inspection Requirements ......................................................................................... 1-3

A. PreflightInspection ............................................................................................. 1-3B. Lightning Strike Inspection ................................................................................. 1-3

2. Inspection Procedures ............................................................................................. 1-4

3. Airworthy Damage ................................................................................................... 1-5

4. Unairworthy Damage ............................................................................................... 1-5

5. Minor/Major Repair .................................................................................................. 1-5

6. SpecificChecks ....................................................................................................... 1-5


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Page 1-2 REPAIR LIMITS 61-10-73 Sep/14




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1. Inspection Requirements

NOTE: SpecificHartzellPropellerInc.manualsandservicedocumentsareavailableontheHartzellwebsiteatwww.hartzellprop.com.RefertotheRequiredPublicationssectionintheIntroductionchapterofthismanualfortheidentificationofthesepublications.

A. PreflightInspection

(1) Followpropellerpreflightinspectionproceduresasspecifiedintheaircraftmaintenancemanual,theaircarrier'soperationalspecifications,orthepropellerowner's manual.

B. Lightning Strike Inspection

(1) Avisualandcoin-tapinspectionisonlyrequiredifthedomehashadasuspectedlightningstrike.Ifinvolvedinalightningstrikethedomemustbeinspectedfordamage.

CAUTION: ANYCOMPOSITESPINNERSUSPECTEDOFLIGHTNINGSTRIKEMUSTBEINSPECTEDANDMAYREQUIREOVERHAUL.

(2) A lightning strike may enter a composite spinner anywhere on the dome, but the most probable locations are the spinner nose or around the cutouts.

(a) In some instances, lightning has been known to exit the blade and enter the spinner, which causes damage around the cutouts.

(3) Ifthereisalightningstrike,adarkenedorburnedarea,usuallyintheproximityofthenoseorbladecutoutisnoticeable.

(4) Ifalightningstrikeofthepropellerissuspected,carefullyexaminethespinnerfordamage.

(a) Visuallyexaminethespinnerforburnedareasandcracks.

(b) Insuspectareas,performacoin-tapinspectiontodetermineifdebondsand/or delaminations are present.

1 Performtheinspectioninaccordancewiththe"Coin-TapInspection"section in this chapter.

(c) Compare the damage to the airworthy damage limits and applicable repair procedures in Table 1-1, Repair Limits by Damage Type.

1 Ifalldamageiswithinthelimitsspecified,thedamageisconsideredairworthy.

2 Ifthedamageisgreaterthanthepermittedairworthylimitsortheminorrepairlimits,contactHartzellPropellerInc.forpossiblerepair.


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2. Inspection Procedures

A. Acoin-tapinspectionisonlyrequiredifthedomehasbeenstruckbyaforeignobjectorhasvisibledamage.Ifinvolvedinaforeignobjectstrikeorifthereisvisibledamage,thedomemustbeinspectedforadelaminationoradebond.

B. Coin-Tap Inspection

(1) Compositespinnersareinspectedfordelaminationsanddebondsbytappingthesurfacewithawasher-shapedmetaltapperor"coin".

(a) RefertotheToolingchapterofthismanualforthedescriptionofa"coin".

(2) Usinga"coin",tapthesurfacetobeinspected.RefertoFigure1-1.

(a) Ifthereisanaudiblechange,soundinghollowordead,adebondordelamination is likely.

1 Apreviousrepairwillalsoresultinanaudiblechangeinsound.

(b) Ifasuspecteddebondordelaminationisfound,makeathoroughcoin-tapinspectiontodefinethepreciseareaofdebondordelamination.

(c) Using a pencil, outline the suspected area to determine the approximate sizeofthedamage.

(3) Refertotheairworthydamagelimitsandapplicablerepairproceduresin Table 1-1, Repair Limits by Damage Type.

Coin-Tap Inspection Figure 1-1



173

3. Airworthy Damage

A. Fordefinitionsanddeterminationofrepair,refertotheIntroductionchapterofthismanual.

B. Monitorareasofairworthydamageandrepairassoonaspractical.

C. A crack that is associated with a delamination typically indicates impact damage. ContactHartzellPropellerInc.ifacrackassociatedwithadelaminationisidentified.

D. Forairworthydamagelimits,refertoTable1-1,RepairLimitsbyDamageType.

(1) RepairLimitsbyDamageType,Table1-1providesthelimitsforairworthydamage and minor repair.

(2) AirworthydamagedoesnotexceedthelimitsgiveninTable1-1,RepairLimitsby Damage Type.

(3) Airworthydamagedoesnotaffectthesafetyorflightcharacteristicsofthespinner.

4. Unairworthy Damage

CAUTION: UNAIRWORTHYDAMAGETOAHARTZELLPROPELLERINC.COMPOSITESPINNERMUSTBEREPAIREDBEFORETHENEXTFLIGHT.

A. RefertotheIntroductionchapterofthismanualfordefinitionanddeterminationofrepair.

B. Any damage that is more than the permitted airworthy limits is unairworthy. For personnelauthorizedtoperformmajorrepairsrefertotheintroductionchapterofthismanual.

C. Areasofunairworthydamagemustberepairedbeforefurtherflight.

D. Exceptionstothispolicymaybepossible,butrequirewrittenauthorizationfromHartzellPropellerInc.

5. Minor/Major Repair

A. Minorrepairisthatwhichmaybedonesafelyinthefieldbyacertifiedaircraftmechanic.

B. Majorrepairworkisthatwhichexceedstheminorrepairlimitsasspecifiedin Table 1-1, Repair Limits by Damage Type in this chapter.

6. SpecificChecks

A. SpecificComponentChecks-RefertoTable1-1,RepairLimitsbyDamageType.


173


Crack 0.75 inch (19.0 mm)

Crack at the Blade Cutout Figure 1-2

7 REPAIR LIMITS 61-10-73 Rev.7May/17


173

EXAMINE AIRWORTHY DAMAGE LIMITS

MINOR REPAIR LIMITS

1. DOME

A. Visuallyexaminethebladecutoutsforcracks. RefertoFigure1-2.

Themaximumpermittedlengthofacrackatthebladecutoutis0.75inch(19.0mm).Themaximumpermittednumberofcracksinadomeisthree.Themaximumpermittednumberofcracksineachcutoutisone.

Minor repair is not permitted. Major Repairmaybepermitted,refertoNOTE.

B. Visuallyexaminethemountingholesforcracks.

ThemaximumpermittednumberofcracksheadingfromthemountingholeathalfthedistancetothewasherODisone.


C. Visuallyexaminethetrimlineforcracks.

ThemaximumpermittednumberofcracksalongthetrimlineheadingtowardamountingholeathalfthedistancetothewasherODisone.Themaximumpermittedlengthofacrackis0.5inch(12.7mm).

Minorrepairisnotpermitted.Ifacrackisgreaterthantheairworthydamagelimits,aMajorRepairmaybepermitted.RefertoNOTE.

D. Visuallyexaminethedomeforcracksnotatthetrimlineormountingholes.

ContactHartzellPropellerInc.ProductSupportDepartmentforevaluation.

Minor repair is not permitted. Contact HartzellPropellerInc.ProductSupportDepartmentforevaluation.

E. Visuallyexaminethedomefornoseerosion.

Themaximumpermitteddepthoferosionisonelayerdeep.

IftheerosioniswithintheAirworthyDamageLimits,repairinaccordancewithsection,"NoseErosion"intheMinorRepairchapterinthismanual.Iferosionisgreaterthantheairworthydamagelimits,aMajorRepairmaybepermitted.RefertoNOTE.

F. Visuallyexaminethedomefordelamination.

Becauseadelaminationonanyspinnerpartisrareandeachcaseisunique,contactHartzellPropellerInc.ifadelaminationisidentified.


G. Visuallyexaminetheerosionmaskformissingmaterial,looseedges,orwear.

Missingmaterial,looseedges,orwearthroughtheerosionmaskisnotpermitted.

Replacetheerosionmaskinaccordancewiththesection"RemovaloftheErosionMask"intheMinorRepairchapterofthismanual.

NOTE:FORPERSONNELAUTHORIZEDTOPERFORMMAJORREPAIRSREFERTOTHEINTRODUCTIONCHAPTEROFTHISMANUAL.

Repair Limits by Damage Type Table 1-1


173

Page 1-8 REPAIR LIMITS 61-10-73 Rev.7May/17

Repair Limits by Damage Type Table 1-1 - continued


MINOR REPAIR LIMITS

1. DOME-continued

H. VisuallyexaminetheUHMWtapeforwear.

Thetapemustnotbelooseoraffectthefitofthespinner.

ReplacetheUHMWtapeinaccordancewiththesection"ReplacementoftheUHMWTape"intheMinorRepairchapterofthismanual.

Fordomeunitswithacomposite/metalforwardbulkheadthatisbondedtothedome.I. Visuallyexaminethe

bondbetweentheforwardbulkheadandthedome.

Themaximumpermittedloosenessofthebondis1/4ofthecircumference.

Aforwardbulkheadthatisbondedtothedomeisnotrepairable.IftheloosenessoftheforwardbulkheadisgreaterthanthepermittedAirworthyDamageLimits,replacethespinnerdomeandtheintegralforwardbulkhead.

J. Visuallyexaminetheforwardbulkheadforcracks.

Acrackisnotpermitted. Aforwardbulkheadthatisbondedtothedomeisnotrepairable.Ifthereisacrack,replacethespinnerdomeandtheintegralforwardbulkhead.

K. Compositeforwardbulkheadonly: Visuallyexaminethecompositeforwardbulkheadfordelamination.

Becauseadelaminationonanyspinnerpartisrareandeachcaseisunique,contactHartzellPropellerInc.ifadelaminationisidentified.

ContactHartzellPropellerInc.forevaluation.

L. Metalforwardbulkheadonly: Visuallyexaminethemetalforwardbulkheadforcorrosionor pitting.

Themaximumpermitteddepthofpittingis0.003inch(0.08mm).Themaximumpermitteddiameterofpittingis0.063inch(1.60mm). Corrosion is not permitted.

LightpolishingwithanabrasivepadCM47orequivalentisoptional.Itisrecommendedthatanaluminum-typeautomotivepolishbeappliedafterpolishingwithanabrasivepad. Aforwardbulkheadthatisbondedtothedomeisnotrepairable.IfthecorrosionorpittingisgreaterthanthepermittedAirworthyDamageLimits,replacethespinnerdomeandtheintegralforwardbulkhead.


9 REPAIR LIMITS 61-10-73 Rev.7May/17


173


MINOR REPAIR LIMITS

DomeModelE-5312-()Only. UsedwithSpinnerAssemblyE-5311-().

CAUTION:CONTINUEDOPERATIONOFAE-5312-()DOMEWITHADAMAGEDORMISSINGBUSHINGMAYMAKETHESPINNERNON-REPAIRABLE.ITMAYALSOMAKETHEPITCHCHANGERODUNAIRWORTHY.

M. Visuallyexaminethedomeforabushingthatismissing,loose,or worn.

Abushingthatislooseormissingisnotpermitted.Wearmustnotinterferewiththebushingfittingsnuglytothepitchchangerod.

Ifthebushingisloose,missing,orthewearisgreaterthantheAirworthyDamageLimits,replacethebushinginaccordancewiththesection"ReplacementofForwardBulkheadBushingonE-5312-1Dome"intheMinorRepairchapterofthismanual.

N. Visuallyexaminethedomeforfrettingwearattheradiusofthedome cutout.

Themaximumpermittedareaoffrettingwearis2squareinches (1290squaremm).


DomeModelE-5580-()Only. UsedwithSpinnerAssemblyE-5579-().O. Visuallyexaminethe

domeforadebondoftheintegralerosionshield.

Themaximumpermittedtotalareaofadebondis1.0squareinch (645squaremm).

Minorrepairisnotpermitted.Ifadebondisgreaterthantheairworthydamagelimits,aMajorRepairmaybepermitted.RefertoNOTE.

P. Visuallyexaminethedomeforexposedcarbonmaterial.

Carboncompositematerialbeneaththecapmaynotbeexposed.


Q. Visuallyexaminethedomeforpinholes,pitting,andporosityforwardofthedome/domeerosionshieldpartingline

Damagethroughtheerosionshieldandintothecarboncompositematerialbeneaththecapisnotpermitted.

Repairinaccordancewiththesection,"DomeErosionShieldRepair"intheMinorRepairchapterofthismanual.




173



MINOR REPAIR LIMITS

2. MAINBULKHEAD FIGURE 1-3

A. VisuallyexaminethemainbulkheadforcrushedmaterialattheODtrimline.Referto Figure 1-3.

AcrushedareaoftheODtrimlineuptohalfthedistancetothedomemountingholecenterispermitted.

IftheamountofcrushedmaterialiswithintheAirworthyDamageLimits,repairinaccordancewithsection,"CracksandCrushedorMissingMaterialoftheBulkheadODTrimline"intheMinorRepairchapterofthismanual.Ifdamageisgreaterthantheairworthydamagelimits,aMajorRepairmaybepermitted.Referto NOTE.

B. VisuallyexaminethemainbulkheadforcracksattheODtrimline.

Themaximumpermittednumberofcracksfromthetrimlinetohalfthe totalflangeheightisone.Themaximumpermittednumberofcracksatanynutplatelocationfromthetrimlineisone.Themaximumpermittednumberofcracksforeachfillerplatelocationisone.

CrackedareaoftheODtrimlineuptohalfthedistancetothedomemountingholecenter,mayberepairedinaccordancewiththesection"CracksandCrushedorMissingMaterialoftheBulkheadODTrimline"intheMinorRepairchapterofthismanual.IfthecrackisgreaterthantheAirworthyDamageLimits,replacethebulkhead.

C. VisuallyexaminethemainbulkheadforcracksnotontheOD.

ContactHartzellPropellerInc.ProductSupportDepartmentforevaluation.

Minor repair is not permitted.



APS994CrushedorMissingMaterial

FlangeHeight

Crushed or Missing Material at the OD Trimline Figure 1-3



173


MINOR REPAIR LIMITS

2. MAINBULKHEAD-continued

D. Visually examine the mainbulkheadformissing material at the ODtrimline.Referto Figure 1-3.

Missing material at the OD trimline to amaximumofhalfthedistancetothehole center is permitted. A maximum offourmissingareasispermitted.

IfthemissingmaterialiswithintheAirworthy Damage Limits, repair in accordancewithsection,"CracksandCrushedorMissingMaterialoftheBulkheadODTrimline"intheMinorRepairchapterofthismanual.

E. Visually examine the mainbulkheadforadamaged or loose rivet.

Adamagedorlooserivetisnotpermitted.

Ifadamagedorlooserivetisfound,replacetherivetinaccordancewith"Replacing a Nutplate on a Composite Bulkhead"intheMinorRepairchapterofthismanual.

F. Visually examine the mainbulkheadforamissingrivet.

Onemissingrivetoneachnutplateispermitted.

Ifmorethanonerivetonanutplateismissing,replacetherivetinaccordancewith"ReplacingNutplatesanRivets"intheMinorRepairchapterofthismanual.

G. Visually examine each nutplateformissingordamaged threads.

Threads must withstand the screw installationsatisfactorily.

Ifthethreadswillnotwithstandscrewinstallationsatisfactorily,replace the nutplate in accordance with"Replacing a Nutplate on a Composite Bulkhead"intheMinorRepairchapterofthismanual.




173



MINOR REPAIR LIMITS

Main Bulkhead Model D-5313-( ) Only. Used with Spinner Assembly D-5311-( ).H. Visually examine the

mainbulkheadfora missing or non-functionalstud.

Amissingornonfunctionalstudisnotpermitted.

Minor repair is not permitted. Contact HartzellPropellerInc.foranevaluation.

I. Visually examine the slipringfordamage.

Forslipringserviceablelimits,refertoHartzellPropellerInc.IceProtectionSystem Component Maintenance Manual 181 (30-60-81).

RefertoHartzellPropellerInc.IceProtection System Component Maintenance Manual 181 (30-60-81).

Main Bulkhead Model D-5581 Only. Used with Spinner Assembly D-5579-( ).J. Visually examine

the main bulkhead forlooseormissinginserts.

A loose or missing insert is not permitted.

Iftheinsertislooseormissing,replace the insert in accordance with thesection"HartzellPropellerInc.Insert Part Number B-6621-375M Installation"intheMinorRepairchapterofthismanual.





173



173


Filler Plate Figure 1-4

Nutplates

Rivets

D-5

315-

1

Blade Cutout

MountingHoles

Rivets



173



MINOR REPAIR LIMITS

3. FILLER PLATE FIGURE 1-4

A. Visually examine the fillerplateforcracksatthe blade cutout.

Amaximumofthreecracksfor eachfillerplateispermitted.Themaximumpermittedlengthofacrackis0.75inch(19.0mm).Ifthelengthofthe crack is greater than the permitted limit,contactHartzellPropellerInc.ProductSupportforevaluation.


B. Visually examine the fillerplateforcracksatthe nutplates.

Themaximumpermittedlengthofacrackishalfthedistancetothefillerplateedge.Ifthelengthofthecrackis greater than the permitted limit, contactHartzellPropellerInc.ProductSupportforevaluation.

Minorrepairisnotpermitted.Ifacrackis greater than the airworthy damage limits,replacethefillerplate.

C. Visually examine the fillerplatefordamagedorlooserivet.

Adamagedorlooserivetisnotpermitted.

Ifadamagedorlooserivetisfound,replacetherivetinaccordancewith"Replacing a Nutplate on a Filler Plate"intheMinorRepairchapterofthis manual.

D. Visually examine the fillerplatebulkheadforamissingrivet.

Onemissingrivetoneachnutplateispermitted.

Ifmorethanonerivetonanutplateismissing,replacetherivetinaccordancewith"Replacing a Nutplate on a Filler Plate"intheMinorRepairchapterofthismanual.

E. Visually examine each nutplateformissingordamaged threads.

Threads must withstand the screw installationsatisfactorily.

Ifthethreadswillnotwithstandscrewinstallationsatisfactorily,replacethe nutplate in accordance with "Replacing a Nutplate on a Filler Plate"intheMinorRepairchapterofthis manual.

F. Visually examine the fillerplateforothercracks.

ContactHartzellPropellerInc.ProductSupportforevaluation.

Minor repair is not permitted. Contact HartzellPropellerInc.ProductSupportforevaluation.



173


Fairing Unit Figure 1-5

OD Trimline

TheAreaoftheTab That is Not AttachedbyRivets

TheAreaoftheTab That is Not

AttachedbyRivets

TheAreaofthe Tab That is Attached

byRivets

TheAreaofthe Tab That is Attached byRivets

RivetsThatAttachthe Tab to the

Fairing Unit.

1045

71b,

d

Metal Tab



173



MINOR REPAIR LIMITS

4. FAIRING UNIT, except the Metal Tab FIGURE 1-5

A. Visually examine the fairingunitforcrushedmaterial at the OD trimline.

AcrushedareaoftheODtrimlineuptohalfthedistancetothebulkheadmounting hole center is permitted.

Iftheamountofcrushedmaterialis within the Airworthy Damage Limits, repair in accordance with the section,"CracksandCrushedorMissing Material on the Fairing Unit ODTrimline"intheMinorRepairchapterofthismanual.Iftheamountofcrushedmaterialisgreaterthantheairworthy damage limits, replace the faringunit.

B. Visually examine the fairingunitforcracksat the OD trimline.

The maximum permitted number ofcracksfromthefairingunitODtrimlinetohalfthetotalflangeheightis one.

AcrackedareaoftheODtrimlineuptohalfthedistancetothedomemounting hole center, may be repaired in accordance with the section"CracksandCrushedorMissing Material on the Fairing OD Trimline"intheMinorRepairchapterofthismanual. Major Repair may be permitted,refertoNOTE.

C. Visually examine the fairingunitforcracksnot on the OD.

ContactHartzellPropellerProductSupportDepartmentforevaluation.

ContactHartzellPropellerProductSupportDepartmentforevaluation.

D. Visually examine the fairingunitformissingmaterial at the OD trimline.

Missing material at the OD trimline to amaximumofhalfthedistancetothemounting hole center is permitted. A maximumoffourcrushedormissingareas is permitted.

Iftheamountofmissingmaterialiswithin the Airworthy Damage Limits, repair in accordance with the section, "CracksandCrushedorMissingMaterialontheFairingODTrimline"intheMinorRepairchapterofthismanual. Ifamountofmissingmaterialis greater than the airworthy damage limits, replace the dome.



173



MINOR REPAIR LIMITS

4. FAIRING UNIT, except the Metal Tab - continued FIGURE 1-5

E. Visually examine thefairingunitfordelamination.

Because a delamination on any spinner part is rare and each case isunique,contactHartzellPropellerInc.ifadelaminationisidentified.


5. FAIRING UNIT, METAL TAB ONLY FIGURE 1-5

A. Visually examine the metaltabforcracksinthe area not attached byrivets.

A crack is not permitted. Ifthereisacrackinthemetaltab,replacethefairingunit.

B. Visually examine each nutplateforalooserivet.

Alooserivetisnotpermitted. Iftherivetisloose,replacetherivetin accordance with the section, "ReplacingNutplatesandRivetsontheTaboftheFairingUnit"intheMinorRepairchapterofthismanual.

C. Visually examine each nutplateformissingordamaged threads.

Threads must withstand the screw installation.

Ifthescrewinstallationisnotsatisfactory,replacethenutplatein accordance with the section, "ReplacingNutplatesandRivetsontheTaboftheFairingUnit"intheMinorRepairchapterofthismanual.

D. Visually examine the rivetsthatattachthetabtothefairingunit.

Amissingrivetisnotpermitted. Ifarivetismissing,replacetherivetinaccordancewiththesection"ReplacingaRivetontheTaboftheFairingUnit"intheMinorRepairchapterofthismanual.



19 REPAIR LIMITS 61-10-73 Rev. 4 Aug/16


173


MINOR REPAIR LIMITS

6. FORWARD BULKHEAD UNIT, P/N 106187

A. Visually examine the forward bulkhead unit for cracks or broken material.

Cracks or broken material are not permitted.

If there are cracks or broken material, replace the forward bulkhead unit.

B. Visually examine the forward bulkhead unit for cuts or gouging.

Cuts or gouges that extend through the entire surface of the forward bulkhead unit are not permitted. Cuts or gouges that decrease the rigidity of the forward bulkhead unit are not permitted.

If a cut or gouge extends through the entire surface or decreases the rigidity of the forward bulkhead unit, replace the forward bulkhead unit.

C. Visually examine the forward bulkhead unit for abnormal wear or deformation.

Wear or deformation must not interfere with or affect the fit, function, or rigidity of the forward bulkhead unit.

If wear or deformation is greater than the permitted Airworthy Damage Limits, replace the forward bulkhead unit.

NOTE: FOR PERSONNEL AUTHORIZED TO PERFORM MAJOR REPAIRS REFER TO THE INTRODUCTION CHAPTER OF THIS MANUAL.



173

Page 1-20 REPAIR LIMITS 61-10-73 Rev. 4 Aug/16


1 MINOR REPAIR 61-10-73 Sep/14


173

MINOR REPAIR - CONTENTS

1. General ...................................................................................................................... 2-32. Dome.......................................................................................................................... 2-3

A. Nose Erosion ....................................................................................................... 2-3B. Dome Erosion Shield Repair ............................................................................... 2-7C. Cracks and Crushed or Missing Material of the Dome OD Trimline .................... 2-9D. Replacement of the UHMW Tape CM137 ............................................................ 2-9E. Removal of the Erosion Mask ............................................................................ 2-10

3. Main Bulkhead ......................................................................................................... 2-12A. Cracks and Crushed or Missing Material of the Bulkhead OD Trimline ............. 2-12B. De-ice Lead Wire Adel Clamp Attachment Point - Spinner Model: D-5311-( ) .. 2-12C. Synchrophaser Target Attachment - Spinner Model: D-5311-( ) ....................... 2-14D. De-ice Terminal Blocks - Spinner Model D-5311-( ) ........................................... 2-16E. Insert Replacement - E-5579-6 Bulkhead - Hartzell Propeller Inc. Part

Number B-6621-375M Insert ............................................................................. 2-19F. Replacement of Forward Bulkhead Bushing on D-5312-1 Dome ...................... 2-23G. Replacing a Nutplate on a Composite Bulkhead ............................................... 2-26H. Replacing a Nutplate on a Filler Plate ................................................................ 2-28

4. Fairing Unit ............................................................................................................... 2-30A. Cracks and Crushed or Missing Material on the Fairing Unit OD Trimline ......... 2-30B. Replacing Nutplates and Rivets on the Tab of the Fairing Unit .......................... 2-30C. Replacing a Rivet on the Tab of the Fairing Unit ................................................ 2-30

5. Lightning Strike ........................................................................................................ 2-32



173

LIST OF FIGURES

LIST OF TABLES

Spinner Repair Materials .........................................................Table 2-1 ......................... 2-4

Nutplates and Rivets That Can Be Replaced ..........................Table 2-2 ....................... 2-24

Minor Repair Limits of Crushed or Missing Material for the Dome OD Trimline ..................................................Figure 2-1 ....................... 2-6

UHMW Tape CM137 ................................................................Figure 2-2 ....................... 2-8

Minor Repair Limits of Crushed or Missing Material for the Main Bulkhead OD Trimline ...................................... Figure 2-3 ......................2-11

B-6621-375M Insert .................................................................Figure 2-4 ..................... 2-18



173

1. General

A. Fordefinitionsandpersonnelrequirements,refertotheIntroductionchapterofthismanual.

2. Dome

A. NoseErosion

(1) Thisrepairmaybeperformedonerosionofthecompositematerialatthedomenoseofnotmorethanonelayer.

(a) Forcuredplythicknessofthematerial,refertoTable2-1SpinnerRepair Materials.

(b) Ifthedamageismorethanonelayer,contactHartzellPropellerInc.forevaluation.

(c) Thisrepairdoesapplytotherepairofthedomeerosionshield.ForrepairofthedomeerosionshieldrefertotheDomeErosionShieldRepairsectioninthischapter.

(2) Usingagrinderorsanderwith140gritorfinersandpaper,removethepaintfromaroundthedamagedareatoproduceasmoothtransitionfromthedamagedareatothedomesurface.

WARNING: ADHESIVESANDSOLVENTSAREFLAMMABLEANDTOXICTOTHESKIN,EYES,ANDRESPIRATORYTRACT.SKINANDEYEPROTECTIONAREREQUIRED.AVOIDPROLONGEDCONTACTANDBREATHINGOFVAPORS.USESOLVENTRESISTANTGLOVESTOMINIMIZESKINCONTACTANDWEARSAFETYGLASSESFOREYEPROTECTION.USEINAWELLVENTILATEDAREAAWAYFROMSPARKSANDFLAME.READANDOBSERVEALLWARNINGLABELS.

(3) UsingcleancheeseclothCM159orequivalentdampenedwithsolvent acetoneCM173,MEKCM106,orMPKCM219,cleanthearea.

(4) PermitthesolventacetoneCM173,MEKCM106,orMPKCM219toevaporate.

(5) UsingadhesiveCM14orCM15,laminateenoughfiberglassfabricCM42orCM55tothedamagedareatoachievetheoriginalshape.

(6) Permittheadhesivetocureinaccordancewithstep2.A.(6)(a)or step2.A.(6)(b).

(a) For12hoursatroomtemperatureabove70°F(21.1°C)

(b) Foraminimumof2hoursat130°to145°F(55to62°C)

(7) Sandtherepairedareatotheoriginalshape.

4 MINOR REPAIR 61-10-73 Rev.4Aug/16


173

Spinner Repair Materials Table 2-1

Spinner Assembly

PartNumber

Dome Unit

PartNumber

MainBulkhead/AdapterRingPartNumber

Construction Repair Material

Cured Ply

ThicknessD-5253

D-5263 Carbon CM111 0.0075inch (0.190mm)


D-5311-()

D-5312-() Carbon CM111 0.0075inch (0.190mm)


D-5362



E-5579-( )

E-5580-4 Carbon CM111 0.0075inch (0.190mm)

E-5581 Carbon CM111 0.0075inch (0.190mm)

D-7409-()



E-7480

E-7481 Carbon CM111 0.0075inch (0.190mm)


101298

101299 Carbon CM111 0.0075inch (0.190mm)

D-7084-1G Metal --- ---102870( )

102885( ) Carbon/ Fiberglass CM55 0.0085inch

(0.215mm)

102892 Carbon/ Fiberglass CM55 0.0085inch

(0.215mm)

4.1 MINOR REPAIR 61-10-73 Rev. 4 Aug/16


173

Spinner Repair Materials Table 2-1, continued

103409( )

103410( ) Fiberglass CM55 0.0085 inch (0.215 mm)

C-2472-6P Metal --- ---103585( )


103584( ) Adapter Ring Unit Metal --- ---

103629( )


103628( ) Adapter Ring Unit Metal --- ---

104529

104573 Carbon/ Fiberglass CM55 0.0085 inch

(0.215 mm)104572

Main BulkheadCarbon/

Fiberglass CM55 0.0085 inch (0.215 mm)

104571 Fairing Unit

(Does Not Include the Tab)

Carbon/ Fiberglass CM55 0.0085 inch

(0.215 mm)

104888-( )

104886-( ) Fiberglass CM55 0.0085 inch (0.215 mm)

104887 Metal --- ---105085( )

105122( ) Carbon/ Fiberglass CM55 0.0085 inch

(0.215 mm)


(0.215 mm)105127( )


(0.215 mm)


(0.215 mm)105656( )


(0.215 mm)105652( ) Metal --- ---

Spinner Assembly

Part Number

Dome Unit

Part Number

Main Bulkhead/Adapter Ring/ Fairing Unit

Part Number


Cured Ply

Thickness

4.2 MINOR REPAIR 61-10-73 Rev. 7 May/17


173

Spinner Assembly

Part Number

Dome Unit

Part Number

Main Bulkhead/Adapter Ring/ Fairing UnitPart Number


Cured Ply

Thickness

105675

105674 Fiberglass CM55 0.0085 inch (0.215 mm)

105672 Metal --- ---105945( )


105944( ) or C-885-3( ) Adapter Ring Unit Metal --- ---

106040( )


(0.215 mm)106348( ) Metal --- ---

106188( )



106215( )


C-2472-6P Metal --- ---106311( )


(0.215 mm)


(0.215 mm)106574( )


106573( ) Metal --- ---106848( )


(0.215 mm)106348( ) Metal --- ---

106871( )

106911( ) Carbon CM111 0.0075 inch (0.190 mm)

106910( ) Metal --- ---


5 MINOR REPAIR 61-10-73 Rev. 7 May/17


173

106957( )


(0.215 mm)106955( )

Main BulkheadCarbon/

Fiberglass CM55 0.0085 inch (0.215 mm)

104571 Fairing Unit

(Does Not Include the Tab)

Carbon/ Fiberglass CM55 0.0085 inch

(0.215 mm)

Spinner Assembly

Part Number

Dome Unit

Part Number

Main Bulkhead/Adapter Ring/ Fairing Unit

Part Number


Cured Ply

Thickness




173

Minor Repair Limits of Crushed or Missing Material for the Dome OD TrimlineFigure 2-1

AP

S10

21B

Half the Distance to Hole Centerline

Distance to Hole Centerline

Taper of 0.25 inch (6.4 mm) minimum

Crushed or Missing Material

Crack




173

(8) Make an inspection of the repaired area in accordance with the section "Coin-Tap Inspection Procedure" in the Repair Limits chapter of this manual.

(a) Repair any debonds or voids.

(9) RefinishinaccordancewiththeFinishProcedureschapterofthismanual.

B. Dome Erosion Shield Repair

(1) Thisrepairmaybeperformedforpinholes,pitting,andporosityforwardofthedome/dome erosion shield parting line.

(2) Repair any defect or damage that is through the dome erosion shield into the graphitefiberandKevlar® material in accordance with the steps in the Nose Erosionsectionofthischapter,beforeperformingtherepairofthedomeerosion shield.

WARNING 1: ADHESIVES AND SOLVENTS ARE FLAMMABLE AND TOXIC TO THESKIN,EYES,ANDRESPIRATORYTRACT.SKINANDEYEPROTECTIONAREREQUIRED.AVOIDPROLONGEDCONTACTAND BREATHING OF VAPORS. USE SOLVENT RESISTANT GLOVESTOMINIMIZESKINCONTACTANDWEARSAFETYGLASSESFOREYEPROTECTION.USEINAWELLVENTILATEDAREAAWAYFROMSPARKSANDFLAME.READ AND OBSERVE ALL WARNING LABELS.

WARNING 2: WEARVINYLORLATEXGLOVESWHENREPAIRINGSPINNERDOME EROSION TO PREVENT TOXIC MATERIAL FROM CONTAMINATING SKIN.

(3) Repair Procedure

(a) Apply adhesive CM71 to the area to be repaired.

(b) QuicklyremoveexcessadhesiveandimmediatelyapplytalcpowderCM72 on the adhesive.

(c) Usingaswirlingmotion,pushthetalcpowderCM72intothedamagedarea.

(d) Permittheareatodryforapproximately5minutes.

(e) Using180gritorfinersandpaper,carefullyhandsandtheareauntilsmooth.

(f) Repeatsteps2.B.(3)(a)through3.B.(3)(e),asnecessary,tomakesureofa smooth surface.

(g) RefinishinaccordancewiththeFinishProcedureschapterofthismanual.



173

UHMW Tape CM137 Installation Location

Spinner Part Number

Dome Part Number

Configuration

E-7409 D-7408 AE-7409-2 D-7408-3 AE-7409-3 D-7408-3 AE-7480 E-7481 B101298 101299 A102870 102885 A103409 103410 A103585 103582 A103629 103627 A

104529( ) 104573( ) A105127( ) 105129( ) A

ConfigurationA ConfigurationB

Spinner Part Number

Dome Part Number

Configuration

105656( ) 105651( ) A105945( ) 105943( ) A106040( ) 106039( ) A106215( ) 106214( ) A106574( ) 103582( ) A106848( ) 106847( ) A106871( ) 106911( ) A

UHMW Tape CM137 Figure 2-2

TPI-1

73-B

ULK

HE

AD

(-2)



173

C. Cracks and Crushed or Missing Material of the Dome OD Trimline

(1) Thisrepairmaybeperformedonacrackedorcrushedarea,oranareawithmissing material of the OD trimline up to half the distance to the center of the dome mounting hole. Refer to Figure 2-1.

(2) Usingagrinderorsanderwithnocoarserthan60gritsandpaper,removethedesired material using 0.25 inch (6.4 mm) minimum radius.

(3) Using150gritorfinersandpaper,polishtheedges.

D. Replacement of the UHMW Tape CM137(1) General

(a) To determine if UHMW tape CM137 is applicable for the forward bulkhead ofthedome,refertoFigure2-2.

(b) ForthelocationoftheUHMWtapeontheforwardbulkheadofthedome,refer to Figure 2-2.

(2) Materials(a) UHMW tape CM137

(3) Removal Procedure(a) For each piece of UHMW tape CM137 tobereplaced,griptheedgeofthe

UHMW tape CM137 and pull to remove it from the forward bulkhead of the dome.

(4) Cleaning

WARNING: ADHESIVES AND SOLVENTS ARE FLAMMABLE AND TOXIC TOTHESKIN,EYES,ANDRESPIRATORYTRACT.SKINANDEYEPROTECTIONAREREQUIRED.AVOIDPROLONGEDCONTACT AND BREATHING OF VAPORS. USE SOLVENT RESISTANT GLOVES TO MINIMIZE SKIN CONTACT AND WEARSAFETYGLASSESFOREYEPROTECTION.USEINAWELLVENTILATEDAREAAWAYFROMSPARKSANDFLAME.READ AND OBSERVE ALL WARNING LABELS.

(a) UsingcheeseclothCM159orequivalentdampenedwithsolvent acetoneCM173,MEKCM106,orMPKCM219,wipethesurfacecleanwhere the UHMW tape CM137 will be installed on the forward bulkhead of the dome.

(5) Installation Procedure

(a) Cut pieces of UHMW tape CM137thatareapproximately2.5inches (63 mm).

1 Cut the number of pieces of UHMW tape CM137 needed to complete the replacement.

(b) Install the UHMW tape CM137 in accordance with Figure 2-2.



173

E. Removal of the Erosion Mask(1) General

(a) RefertoTable3-1FinishProceduresinthismanual,forapprovalforinstallation of the erosion mask.

(2) Removal Procedure(a) Lift one edge of the erosion mask (510) off of the dome.

(b) Workaroundtheperimeteroftheerosionmask(510),liftingtheedgesofthe erosion mask (510) from the dome.

(c) Grip the edges of the erosion mask (510) and pull to remove it from the dome.

(d) Discard the removed erosion mask (510).

WARNING: ADHESIVES AND SOLVENTS ARE FLAMMABLE AND TOXIC TOTHESKIN,EYES,ANDRESPIRATORYTRACT.SKINANDEYEPROTECTIONAREREQUIRED.AVOIDPROLONGEDCONTACT AND BREATHING OF VAPORS. USE SOLVENT RESISTANT GLOVES TO MINIMIZE SKIN CONTACT AND WEARSAFETYGLASSESFOREYEPROTECTION.USEINAWELLVENTILATEDAREAAWAYFROMSPARKSANDFLAME. READ AND OBSERVE ALL WARNING LABELS.

(e) UsingcheeseclothCM159orequivalentdampenedwithsolventtolueneCM41,MEKCM106,orMPKCM219,wipethesurfacetoremoveadhesive residue from the dome.

(3) Refer to the Finish chapter in this manual for installation procedures for the erosion mask.



173

Minor Repair Limits of Crushed or Missing Material for the Main Bulkhead OD Trimline Figure 2-3

AP

S-1

031A

Half the Distance to Hole Centerline

Distance to Hole Centerline


Crushed or Missing Material

Crack




173

3. Main Bulkhead

A. Cracks and Crushed or Missing Material of the Bulkhead OD Trimline

(1) Thisrepairmaybeperformedonacrackedorcrushedarea,oranareawith missing material of the OD trimline up to half the distance to the dome mounting hole center. Refer to Figure 2-3.



B. De-ice Lead Wire Adel Clamp Attachment Point - Spinner Model: D-5311-( )

(1) ThisrepairaddsanAdelclampreinforcement,HartzellPropellerInc.partnumberB-5870(),toeachsideofthebulkhead.Thereinforcementprovidesprotection from the screw head and the Adel clamp.

CAUTION: WHILESANDING,USEEXTREMECAUTIONNOTTOREMOVECOMPOSITE MATERIAL. THE LAMINATE IN THIS AREA IS THINANDTHESTRENGTHOFTHESTRUCTUREMAYBECOMPROMISED IF MATERIAL IS REMOVED.

(2) Usingnocoarserthan60gritsandpaper,sandtheareaaroundtheAdelclampattachment holes to remove the paint.

WARNING: ADHESIVES AND SOLVENTS ARE FLAMMABLE AND TOXIC TO THESKIN,EYES,ANDRESPIRATORYTRACT.SKINANDEYEPROTECTIONAREREQUIRED.AVOIDPROLONGEDCONTACTAND BREATHING OF VAPORS. USE SOLVENT RESISTANT GLOVESTOMINIMIZESKINCONTACTANDWEARSAFETYGLASSESFOREYEPROTECTION.USEINAWELLVENTILATEDAREAAWAYFROMSPARKSANDFLAME.READ AND OBSERVE ALL WARNING LABELS.

(3) UsingcleancheeseclothCM159orequivalentmoistenedwithsolventacetoneCM173,MEKCM106,orMPKCM219,cleanbothsidesofthebulkhead.

(4) Permit the solvent to evaporate.

(5) Usingnocoarserthan60gritsandpaper,sandthemountingsideofallreinforcements. NOTE: This will “roughen” the material and permit solid adhesion.

(6) UsingacleancheeseclothCM159orequivalentmoistenedwithsolventacetoneCM173,MEKCM106,orMPKCM219,cleanthearea.

(7) Permit the solvent to evaporate.

(8) Ontheenginesideofthebulkhead,applymaskingtapetocovertheholes.

NOTE: The masking tape must hold the adhesive. More than one layer may be necessary.



173

(9) UsingadhesiveCM20,filltheholesfromthepropellerside.

(a) Ifthebulkheadhasdepressions,fillthemwithadhesiveCM20.

(b) Permit the adhesive CM20 to form above the original surface to account for shrinkage during the cure process.

(10) Permit the adhesive CM20 to cure in accordance with step 3.B.(10)(a) or step 3.B.(10)(b).

(a) For 12 hours at room temperature above 70° F (21.1° C)

(b) For a minimum of 2 hours at 130° to 145° F (55 to 62° C)

(11) Remove the masking tape.


(12) Sandthecuredadhesiveuntilthesurfaceisflushwiththesurroundingmaterial.

(13) Apply adhesive CM20 to the propeller side of the bulkhead in the areas that will contact the Adel clamp reinforcements.

(14) Put the Adel clamp propeller side reinforcement in the center over the screw hole on the propeller side and lightly clamp it into position.

(15) UsingcleandrycheeseclothCM159orequivalent,removetheexcessadhesivefrom the bulkhead.

(16) Permit the adhesive to cure in accordance with step 3.B.(16)(a) or step 3.B.(16)(b).



(17) Back-drillthefilledholesfromtheenginesideto0.1695+0.006-0.002inch(4.305+0.152-0.051mm)diameter.

(18) Apply adhesive CM20 on the engine side of the bulkhead in the area that will contact the Adel clamp engine side reinforcement and to the roughened side of the reinforcement.

(19) Put the Adel clamp propeller side reinforcement in the center over the screw hole,andlightlyclampthereinforcementintoposition.

(20) UsingcleandrycheeseclothCM159orequivalent,removetheexcessadhesivefrom the bulkhead.



173

(21) Permit the adhesive CM20 to cure in accordance with step 3.B.(21)(a) or step 3.B.(21)(b).



(22) Fromthepropellerside,back-drilltheholesto0.1953+0.006-0.002inch (4.961+0.152-0.051mm)diameter.

(23) Using140gritorfinersandpaper,deburrtheholes.

(24) Visuallyexaminetherepairedarea.

(25) Repair any debonds or voids.


C. Synchrophaser Target Attachment - Spinner Model: D-5311-( )

(1) Thisrepairaddsasynchrophasertargetreinforcement,Hartzell Propeller Inc. partnumberB-5870(),tothepropellersideofthebulkhead.Thisreinforcementprovides protection from the screw heads used to mount the synchrophaser target.


(2) Usingnocoarserthan60gritsandpaper,sandtoremovethepaintintheareasurrounding the synchrophaser target screw holes.


(3) UsingsolventacetoneCM173,MEKCM106,orMPKCM219,thoroughlycleanboth sides of the bulkhead.

(4) Usingnocoarserthan60gritsandpaper,sandthemountingsideofallreinforcements.

NOTE: This will “roughen” the material to permit solid adhesion.

(5) Ontheenginesideofthebulkhead,applymaskingtapetocovertheholes.

NOTE: The masking tape must hold the adhesive. More than one layer may be necessary.



173

(6) UsingadhesiveCM20,filltheholesfromthepropellerside.

(a) Ifthebulkheadhasdepressions,fillthemwithadhesive.

(b) Permit the adhesive to form above the original surface to allow for shrinkage during the cure process.

(7) Permit the adhesive CM20 to cure in accordance with step 3.C.(7)(a) or step 3.C.(7)(b).






(10) Apply adhesive CM20 to the propeller side of the bulkhead in the area that will contactthesynchrophasertargetreinforcement,andtotheroughenedsideofthe synchrophaser target reinforcement.

(11) Putthereinforcementinthecenteroverthescrewholes,andlightlyclampthepatch into position.

(a) Ifusingaclampwithasmallclampingsurface,usewoodblockscoveredwith vacuum bag material CM45 to make sure of even pressure over the entire reinforcement area.

(12) Usingclean,drycheeseclothCM159orequivalent,removetheexcessadhesive from the bulkhead.

(13) Permit the adhesive CM20 to cure in accordance with step 3.C.(13)(a) or step 3.C.(13)(b).



(14) Back-drillthefilledholesfromtheenginesideto0.1935+0.006-0.002inch(4.915+0.152-0.051mm)diameter.







173

D. De-ice Terminal Blocks - Spinner Model D-5311-( )

(1) ThisrepairaddsaTerminalBlockReinforcement,HartzellPropellerInc.part numberB-5870(),totheenginesideofthebulkhead.Thisreinforcementprovides protection from the screw heads used to mount the terminal blocks.


(2) UsingsolventacetoneCM173,MEKCM106,orMPKCM219,thoroughlycleanboth sides of the bulkhead.

(3) Usingnocoarserthan60gritsandpaper,sandthemountingsideofallreinforcements and the engine side of the bulkhead that will be bonded to the reinforcements.

NOTE: This will “roughen” the material to permit solid adhesion.

(4) Onthepropellersideofthebulkhead,applymaskingtapetocovertheholes.

NOTE: This masking tape must hold the adhesive. More than one layer may be necessary.

(5) Fill the holes from the engine side with adhesive CM20.

(a) Ifthebulkheadhasdepressions,fillthemwithadhesive.

(b) Permit the adhesive to form above the original surface to account for shrinkage during the cure process.

(6) Permit the adhesive CM20 to cure in accordance with step 3.D.(6)(a) or step 3.D.(6)(b).








173

(9) Apply adhesive CM20 to the engine side of the bulkhead in the area that will contacttheTerminalBlockReinforcement,andtotheroughenedsideoftheTerminal Block Reinforcement.

(10) Putthereinforcementinthecenteroverthescrewholes,andlightlyclampthepatch into position.

(a) Ifusingaclampwithasmallclampingsurface,usewoodblockscoveredwith vacuum bag material CM45 to make sure of even pressure over the entire reinforcement area.

(11) Usingclean,drycheeseclothCM159orequivalent,removeexcessadhesivefrom the bulkhead.

(12) Permit the adhesive to cure in accordance with step 3.D.(12)(a) or step 3.D.(12)(b).



(13) Fromthepropellerside,back-drillthefilledholesto0.1695+0.006-0.002inch(4.305+0.152-0.051mm)diameter.




(17) RefinishinaccordancewiththeFinishProcedureschapterinthismanual.



173

B-6621-375M InsertFigure 2-4

Adhesive CM14

Masking Tape

Adhesive Backed Tab

Engine Side

Propeller Side

Adhesive Injection Hole

Engine-Side Bulkhead (70)

Adhesive Injection Hole

NOTE: Oneadhesiveinjectionholemaybeusedtoinjectadhesive,andtheotherhole used to discharge air and adhesive.



173

E. Insert Replacement - E-5579-6 Bulkhead - Hartzell Propeller Inc. Part Number B-6621-375M Insert

(1) General

(a) Overtorquingtheboltsduringdynamicbalanceweightinstallationcanloosenorbreaktheinserts,HartzellPropellerInc.B-6621-375M.Thefollowing is a repair for loose or missing inserts installed on the bulkhead.


(2) Insert Removal

(a) UsingsolventacetoneCM173,MEKCM106,orMPKCM219,thoroughlyclean all oil and grease from both sides of the bulkhead around the insert to be removed.

CAUTION 1: USE EXTREME CAUTION WHEN DRILLING INTO THE THREADS OF THE INSERT TO AVOID DAMAGE TO THE COMPOSITE BULKHEAD. A DAMAGED BULKHEAD MUST BE RETURNEDTOTHEFACTORY.

CAUTION 2: THE BULKHEAD MUST BE PERPENDICULAR TO THE DRILL BIT TO PREVENT DRIFTING OF THE DRILL BIT.

(b) Usinga5/16inchdrillbit,drillintothethreadsoftheinsertuntiltheflangeof the insert is separated from its center portion.

1 Iftheinsertrotates,itmaybenecessarytoinstalla10-32UNFbolt,withajamnutinstalled,intotheoppositesideoftheinsert,andthenclamp the bolt head in a vice to stop rotation.

(c) Remove both halves of the insert from the bulkhead.

CAUTION: THE BULKHEAD MUST BE PERPENDICULAR TO THE DRILL BIT TO PREVENT DRIFTING OF THE DRILL BIT.

(d) Usingadrillpressand9/16inchdrillbit,carefullyremoveanyremainingadhesive from the hole in the bulkhead.

(e) Using180gritorfinersandpaper,deburrtheedgeofthehole.

(f) UsingsolventacetoneCM173,MEKCM106,orMPKCM219,cleanthehole and the area around the hole.



173

(g) Visuallyexaminethebulkheadfordamage.

1 Ifthereisnodamage,gotostep3.E.(4),"HartzellPropellerInc.InsertPart Number B-6621-375M Installation".

2 Ifthereistearingordelaminationofthecompositematerial,gotostep3.E.(3),"RepairoftheInsertHole".

(3) Repair of the Insert Hole

(a) Usingagrinderorsander,removeloosematerialfromaroundtheinserthole.

1 Someofthebulkheadmaterialeven,thoughdamaged,mayremainon the bulkhead.

2 Ifthedamagedmaterialisfullyintact,itshouldremainonthebulkhead.

3 Iftwoormorelayersofmaterialremainonthebulkhead,buttheyareseparatedfromeachother,injectadhesiveCM14betweentheselayers when the repair is made.

(b) CutasufficientamountoffiberglassCM55tocovertherepairarea.

NOTE: Refer to Table 2-1 Spinner Repair Materials for cured ply thickness. The thickest part of the repair area divided by the curedplythickness,equalsthenumberofpatternsrequiredtomaketherepair.Includeafewextrapatternstomakesurethattherewillbesufficientmaterialpresentforthegrindingprocess.

(c) UsingcleancheeseclothCM159orequivalentdampenedwithsolventacetoneCM173,MEKCM106,orMPKCM219,wipetherepairarea.

(d) PermitthesolventacetoneCM173,MEKCM106,orMPKCM219toevaporate.

(e) Cut a piece of vacuum bag CM45 large enough to provide total coverage of the repair plus 3.0 to 4.0 inches (76 to 101 mm) of the bulkhead around the repair.

(f) MixtheadhesiveCM14thoroughly,inaccordancewiththedirectionsonthe container.

(g) Ifapplicable,usingasyringeCM3orequivalent,injectadhesiveCM14between all the layers of the original material remaining in the damaged area.

(h) LaminatethefiberglassCM55overtherepairareaononesideofthebulkhead.

1 Make sure that each layer is thoroughly saturated with adhesive andthatthefiberanglechanges45degreeswitheachpattern,ifapplicable.

(i) Put the pretrimmed vacuum bag material CM45 over the repair area of the bulkhead.



173

(j) Prepareaplateofmetal,plastic,masonite,orequivalent,largeenoughtocover the repair and to permit clamping outside of the repair area.

(k) Put a plate over the repair area on the bulkhead.

CAUTION: EXCESSIVE CLAMP FORCE WILL DAMAGE THE BULKHEAD.

(l) Installaclamponeachendoftheplate,outsideoftherepairarea,toholdthe plate to the trailing edge of the blade.

(m) Ifrepairtotheinsertholeontheothersideofthebulkheadisnecessary,follow steps 3.E.(3)(a) through 3.E.(3)(l).

(n) Permit the adhesive CM14 to cure in accordance with step 3.E.(3)(n)1 or step 3.E.(3)(n)2.

1 For 12 hours at room temperature above 70° F (21.1° C)

2 For a minimum of 2 hours at 130° to 145° F (55 to 62° C)

(o) Remove the plates and the vacuum bag material CM45 from the bulkhead.

(p) Grind or sand to original shape.

(q) Makeaninspectionoftherepairedareainaccordancewiththesection "Coin-tap Inspection Procedure" in the Repair Limits chapter of this manual.

1 Repair any delaminations or voids.

(r) RefinishthebulkheadinaccordancewiththeFinishProcedureschapterofthis manual.

(s) Whentherepairoftheinsertholeissuccessfullycompleted,gotostep3.E.(4) Insert Installation.

(4) Hartzell Propeller Inc. Insert Part Number B-6621-375M Installation. Refer to Figure 2-4.

(a) Align the holes in the insert with the holes in the adhesive-backed tab and put the tab on the new insert that is being installed.

(b) Onthepropellersideofthebulkhead,putapieceofmaskingtapeacrossthe hole for the new insert.

(c) Puttheinsertinthehole,againstthemaskingtape.Referto Figure 2-4.

1 Itisnotnecessarythattheinsertbeflushontheenginesideofthebulkhead.



173

WARNING: ADHESIVECM14MAYBETOXICTOTHESKINANDEYES.SKINANDEYEPROTECTIONAREREQUIRED.AVOIDPROLONGED CONTACT. USE IN A WELL-VENTILATED AREA.

(d) MixadhesiveCM14inaccordancewiththemanufacturer'sinstructions.

(e) UsingasyringeCM3orequivalent,injecttheadhesiveCM14throughonehole in the insert until all the air has been eliminated and adhesive comes out the other hole.

(f) RemoveexcessadhesiveCM14.

(g) Permit the adhesive CM14 to cure in accordance with step 3.E.(3)(g)1 or step 3.E.(3)(g)2.

1 For 12 hours at room temperature above 70° F (21.1° C)

2 For a minimum of 2 hours at 130° to 145° F (55 to 62° C)

(h) Remove the tab and the masking tape.

(i) Using180-gritorfinersandpaper,removeanyexcessadhesiveCM14from the insert and the bulkhead.

CAUTION: OVERTORQUINGTHEDYNAMICBALANCEWEIGHTBOLTMAYDAMAGETHEINSERTANDTHEBULKHEAD.

(j) Install the dynamic balance weight bolt into the insert.

(k) Torquethedynamicbalanceweightboltto32In-Lb(3.6N•m)totesttheinsert installation.

1 Replacetheinsertifitrotatesduringthetorquetest.

2 Torquethedynamicbalanceweightboltsto29-31In-Lb (3.3-3.5N•m)whenthedynamicbalanceweightsareinstalled.

(5) RefinishinaccordancewiththeFinishProcedureschapterinthismanual.

23 MINOR REPAIR 61-10-73 Rev.3Dec/15


173

F. ReplacementofForwardBulkheadBushingonD-5312-1Dome

(1) ExaminetheforwardpartofthedomeforthebushingHartzellPropellerInc.partnumberB-6045-12-4.

(2) Ifthereisabushing,removeit.

CAUTION: DONOTDAMAGETHEFORWARDBULKHEADWHENREMOVINGTHEBUSHING.

(a) Putanon-metallic,flat,pointedinstrumentbetweenthebushingandtheforwardbulkheadatthebushingseam.

(b) Removeanddiscardthebushingfromtheforwardbulkhead.

(c) Usinga0.900inch(22.85mm)reamer,handreamtheholeintheforwardbulkhead.

NOTE: Thereisverylittlematerialthathastoberemoved,soittakesverylittleefforttoreamthishole.

(3) Usingemeryclothorsandpaper,lightlysandbothedgesoftheholetoremoveanyburrs.

(4) Removeshavingsorpiecesofthebushingfromthenosepartofthedome.

(5) ReplacethebushingHartzellPropellerInc.partnumberB-6045-12-4.

(a) Putthenewbushinginthecenteroverthepreparedhole.

1 Applypressureuntilallsixteetharestarted.

2 Usingsteadypressure,pushthebushingallthewayintotheholeuntiltheteethclickontothebackofthehole.

(b) Visuallyexaminethebushingtomakesurethatthecontactsurfaceofthebushingisevenallthewayaroundthebulkhead/bushingmatingsurface.

(c) Applyalightfilmofgreasetotheinsidediameterofthebushing.

1 Anygreaseusedtolubricatethepropellerispermitted.

(d) Usinga0.750inch(19.05mm)pluggaugemakeaninspectionofthebushinginstallation.

1 Thegaugeshouldfitsnugly,butnotrequireexcessiveforcetomove.

24 MINOR REPAIR 61-10-73 Rev.4Aug/16


173

Spinner Assembly

Bulkhead/AdapterRing

FillerPlate

HoopUnit

Nutplate Type Rivet

D-5253 D-5264 B-3858-3 Fixed B-3878-3-4

D-5311-(1,2) D-5313(-1) B-3858-3 Fixed B-3878-3-4

D-5311-(1,2) D-5315-1 B-3849-3 Floating B-6673-0310

D-5362 D-5364 B-3858-3 Fixed B-3878-3-4

D-5362 D-5433B-3858-3-dometo hoopunit

Fixed B-3878-3-4

D-5362 D-54337933147602-hoopunit tobulkhead

Fixed B-3878-3-4

E-5579-6 E-5581 B-3858-3 Fixed B-3878-3-4

D-7409(-2,-3) D-7404(-2,-3) B-3858-3 Fixed B-3878-3-4

E-7480 D-6666 B-3858-3 Fixed B-3878-3-4

101298 D-7084-1GB-3846-3 Fixed B-3847-6

B-3849-3 Floating B-3847-6

102870( ) 102892( ) B-3849-3 Floating B-3878-3-4

103409( ) C-2472-6() B-3849-3 Floating B-3847-4

103585( ) 103584()B-3846-3 Fixed B-3847-5

B-3849-3 Floating B-3847-5

103629( ) 103628()B-3846-3 Fixed B-3847-5

B-3849-3 Floating B-3847-5

104529 104572 B-3849-3 Floating B-3878-3-4

Nutplates and Rivets That Can Be ReplacedTable 2-2, page 1 of 2



173

Spinner Assembly

Bulkhead/Adapter

Ring

Filler Plate

Hoop Unit

Nutplate Type Rivet

104888-( ) 104887B-3846-3 Fixed B-3847-4

B-3849-3 Floating B-3847-4

105085( ) 105123( ) B-3849-3 Floating B-3878-3-4

105127( ) 106015( ) B-3849-3 Floating B-3847-4

105656( ) 105652( )B-3846-3 Fixed B-3847-5

B-3849-3 Floating B-3847-5

105945( ) 105944( )B-3846-3 Fixed B-3847-5

B-3849-3 Floating B-3847-5

106040( ) 106348( )B-3846-3 Fixed B-3847-4

B-3849-3 Floating B-3847-4

106188( ) 106185( )B-3858-3 Fixed B-3847-5

B-3849-3 Floating B-3847-4

106215( ) C-2472-6( ) B-3849-3 Floating B-3847-4

106574( ) 106573( ) B-3849-3 Floating B-3847-5

106848( ) 106348( )B-3846-3 Fixed B-3847-4

B-3849-3 Floating B-3847-4

106871( ) 106910( )B-3846-3 Fixed B-3847-5

B-3849-3 Floating B-3847-5

106957( ) 106955( ) B-3849-3 Floating B-3878-3-4

Nutplates and Rivets That Can Be ReplacedTable 2-2, page 2 of 2



173

G. Replacing a Nutplate on a Composite Bulkhead

(1) NutplateRemoval,Method1

WARNING: SOLVENTSAREFLAMMABLEANDTOXICTOTHESKIN,EYES,ANDRESPIRATORYTRACT.SKINANDEYEPROTECTIONAREREQUIRED.AVOIDPROLONGEDCONTACTANDBREATHING OF VAPORS. USE SOLVENT RESISTANT GLOVES TOMINIMIZESKINCONTACTANDWEARSAFETYGLASSESFOREYEPROTECTION.USEINAWELLVENTILATEDAREAAWAYFROMSPARKSANDFLAME.READ AND OBSERVE ALL WARNING LABELS.

(a) UsingsolventacetoneCM173,MEKCM106,orMPKCM219,thoroughlycleanalloilandgreasefrombothsidesofthebulkhead,aroundthenutplate to be removed.

(b) Apply masking material (aluminum foil tape) to the area around the nutplate to avoid damaging the composite material during grinding.

CAUTION 1: USE EXTREME CAUTION WHEN GRINDING THE RIVET SHANKS TO AVOID DAMAGE TO THE COMPOSITE BULKHEAD. A DAMAGED BULKHEAD MUST BE RETURNED TO HARTZELL PROPELLER INC.

CAUTION 2: DO NOT OVERHEAT THE COMPOSITE MATERIAL DURING GRINDINGOFTHERIVETHEADS.IFNECESSARY,USEWATER TO COOL THE NUTPLATE DURING GRINDING.

(c) Usingasmallhand-grinder,removetheheadoftherivetsthatholdthenutplate in place on the bulkhead.

CAUTION: USE EXTREME CAUTION WHEN REMOVING THE NUTPLATES TO AVOID PULLING THE RIVET HEADS THROUGH THE BULKHEAD. A DAMAGED BULKHEAD MUST BE RETURNED TO HARTZELL PROPELLER INC.

(d) Remove the nutplate from the bulkhead by lightly pulling with pliers.

1 Ifthenutplatecannotberemoved,usethegrindertoremovemore material from the nutplate and rivets until the nutplate can be removed.

(e) Remove the rivets from the bulkhead.

1 Ifnecessary,removetherivetheadsfromthebacksideofthebulkhead by using a small pin punch.

(f) Remove the masking material (aluminum foil tape).

(g) UsingacetoneCM173,MEKCM106,orMPKCM219,cleantheholeandthe area around the hole.



173


WARNING: SOLVENTSAREFLAMMABLEANDTOXICTOTHESKIN,EYES,ANDRESPIRATORYTRACT.SKINANDEYEPROTECTIONAREREQUIRED.AVOIDPROLONGEDCONTACTANDBREATHINGOFVAPORS. USE SOLVENT RESISTANT GLOVES TO MINIMIZE SKIN CONTACTANDWEARSAFETYGLASSESFOREYEPROTECTION.USEINAWELLVENTILATEDAREAAWAYFROMSPARKSANDFLAME. READ AND OBSERVE ALL WARNING LABELS.

(a) UsingsolventacetoneCM173,MEKCM106,orMPKCM219,thoroughlyclean all oil and grease from both sides of the bulkhead around the nutplate to be removed.

(b) UsingaNo.40twistdrill,drillthroughtherivetsretainingthenutplateanddiscard the nutplates.

(3) Nutplate Installation

(a) Refer to the Table 2-2 Nutplates and Rivets That Can Be Replaced for the applicable part numbers.

(b) Visuallyexaminethebulkheadfordamage.

1 Ifthereistearingordelaminationofthecompositematerial,returnthe bulkhead to Hartzell Propeller Inc.

(c) Using rivets and a pneumatic or hand rivet installation tool (customer supplied),fastenanewnutplatetothebulkhead.

1 Visuallyexaminethereplacedrivetstomakesurethattherivetheadsareflushwiththesurfaceofthebulkhead.



173

H. Replacing a Nutplate on a Filler Plate

(1) General

CAUTION: DO NOT DAMAGE THE FILLER PLATE WHEN KEEPING THE FILLER PLATE FROM MOVING.

(a) Usingaviseorotherappropriatemethod,keepthefillerplatefrommovingduring removal and installation of the nutplate.



(a) UsingsolventacetoneCM173,MEKCM106,orMPKCM219,thoroughlycleanalloilandgreasefrombothsidesofthefillerplate,aroundthenutplate to be removed.

(b) Apply masking material (aluminum foil tape) to the area around the nutplate to avoid damaging the composite material during grinding.

CAUTION 1: USE EXTREME CAUTION WHEN GRINDING THE SHANKS OF THE RIVETS TO AVOID DAMAGE TO THE FILLER PLATE.

CAUTION 2: DO NOT OVERHEAT THE COMPOSITE MATERIAL DURING GRINDING OF THE HEADS OF THE RIVETS.

(c) Usingasmallhand-grinder,removetheheadoftherivetsthatholdthenutplateinplaceonthefillerplate

1 Ifnecessary,usewatertocoolthenutplateduringgrinding.

CAUTION: USE EXTREME CAUTION WHEN REMOVING THE NUTPLATES TO AVOID PULLING THE HEADS OF THE RIVETS THROUGH THE FILLER PLATE.

(d) Usingpliersandpullinglightly,removethenutplatefromthefillerplate.

1 Ifthenutplatecannotberemovedfromthefillerplate,usethegrinder to remove more material from the nutplate and rivets until the nutplate can be removed.

(e) Removetherivetsfromthefillerplate.

1 Ifnecessary,removetheheadsoftherivetsfromthebacksideofthefillerplatebyusingasmallpinpunch.



173

(f) Remove the masking material (aluminum foil tape).

(g) UsingsolventacetoneCM173,MEKCM106,orMPKCM219,cleantheholeandtheareaaroundtheholeinthefillerplate.



(a) UsingsolventacetoneCM173,MEKCM106,orMPKCM219,thoroughlycleanalloilandgreasefrombothsidesofthefillerplatearoundthenutplate to be removed.

(b) UsingaNo.40twistdrill,drillthrougheachrivetthatattachesthenutplatetothefillerplate.

(c) Discard the nutplates.

(4) Nutplate Installation

(a) Refer to the Table 2-2 Nutplates and Rivets That Can Be Replaced for the applicable part numbers.

(b) Visuallyexaminethefillerplatefordamage.

1 Ifthereistearingordelaminationofthecompositematerial,returnthefillerplatetoHartzellPropellerInc.

(c) Using rivets and a pneumatic or hand rivet installation tool (customer supplied),fastenthenutplatetothefillerplate.

1 Visuallyexaminethenewlyinstalledrivetstomakesurethattheheadsoftherivetsareflushwiththesurfaceofthefillerplate.



173

4. Fairing Unit

A. Cracks and Crushed or Missing Material on the Fairing Unit OD Trimline

(1) Thisrepairmaybeperformedonacrackedorcrushedarea,oranareawithmissing material on the OD trimline up to half the distance to the fairing unit mounting hole center. Refer to Figure 1-5.



B. Replacing Nutplates and Rivets on the Tab of the Fairing Unit

(1) General

(a) This procedure provides a method to replace a nutplate and rivets on the tab of the fairing unit in the area that is not attached to the fairing unit by rivets.

(b) Refer to the Repair Limits chapter of this manual for serviceable limits.

CAUTION: DO NOT MAKE THE HOLE OVERSIZE WHEN DRILLING OUT THE RIVET.

(2) Usingtheappropriatedrillbit,drillouttherivet.

(3) Replace the nutplate and/or rivet in accordance with the procedures in the FAA Advisory Circular 43.13-1B.

C. Replacing a Rivet on the Tab of the Fairing Unit

(1) General

(a) This procedure provides a method to replace a rivet that attaches the tab to the fairing unit.

(b) Refer to the Repair Limits chapter of this manual for serviceable limits.

CAUTION: DO NOT DAMAGE THE FAIRING UNIT OR THE TAB WHEN KEEPING THEM FROM MOVING.

(c) Usingaviseorotherappropriatemethod,keepthefairingunitandtabfrom moving during removal and installation of the rivet.



173

(2) RivetRemoval,Method1

WARNING: SOLVENTSAREFLAMMABLEANDTOXICTOTHESKIN,EYES,ANDRESPIRATORYTRACT.SKINANDEYEPROTECTIONAREREQUIRED.AVOIDPROLONGEDCONTACT AND BREATHING OF VAPORS. USE SOLVENT RESISTANT GLOVES TO MINIMIZE SKIN CONTACT AND WEARSAFETYGLASSESFOREYEPROTECTION.USEINAWELLVENTILATEDAREAAWAYFROMSPARKSANDFLAME.READ AND OBSERVE ALL WARNING LABELS.

(a) UsingsolventacetoneCM173,MEKCM106,orMPKCM219,thoroughlycleanalloilandgreasefrombothsidesofthefairingunit,aroundtherivetto be removed.

(b) Apply masking material (aluminum foil tape) to the area around the rivet to avoid damaging the composite material or the tab during grinding.

CAUTION 1: USE EXTREME CAUTION WHEN GRINDING THE SHANK OF THE RIVET TO AVOID DAMAGE TO THE TAB OF THE FAIRING UNIT.

CAUTION 2: DO NOT OVERHEAT THE COMPOSITE MATERIAL DURING GRINDING OF THE HEADS OF THE RIVET.

(c) Usingasmallhand-grinder,removetheheadoftherivetthatholdsthetabin place on the fairing unit.

1 Ifnecessary,usewatertocoolthetabofthefairingunitduringgrinding.

CAUTION: USE EXTREME CAUTION WHEN REMOVING THE RIVET TO AVOID PULLING THE HEADS OF THE RIVET THROUGH THE TAB OF THE FAIRING UNIT.

(d) Usingpliersandpullinglightly,removetherivetfromthetabofthefairingunit.

1 Iftherivetcannotberemovedfromthetabofthefairingunit,usethegrinder to remove more material from the rivet until the rivet can be removed.

2 Ifnecessary,removetheheadoftherivetfromthebacksideofthetab of the fairing unit by using a small pin punch.

(e) Remove the masking material (aluminum foil tape).

(f) UsingsolventacetoneCM173,MEKCM106,orMPKCM219,cleantheholeandtheareaaroundtheholeinthefillerplate.



173

(3) RivetRemoval,Method2

WARNING: SOLVENTSAREFLAMMABLEANDTOXICTOTHESKIN,EYES,ANDRESPIRATORYTRACT.SKINANDEYEPROTECTIONAREREQUIRED.AVOIDPROLONGEDCONTACT AND BREATHING OF VAPORS. USE SOLVENT RESISTANT GLOVES TO MINIMIZE SKIN CONTACT AND WEARSAFETYGLASSESFOREYEPROTECTION.USEINAWELLVENTILATEDAREAAWAYFROMSPARKSANDFLAME.READ AND OBSERVE ALL WARNING LABELS.

(a) UsingsolventacetoneCM173,MEKCM106,orMPKCM219,thoroughlycleanalloilandgreasefrombothsidesofthefairingunit,aroundtherivetto be removed.

(b) UsingaNo.40twistdrill,drillthroughtherivetthatattachesthetabtothefairing unit.

(c) Discard the rivet.

(4) Rivet Installation

(a) Fairing unit rivet part numbers.

1 Rivet,100degreehead,0.094Dia.Cres. P/NB-3878-()

2 Cherrymax® rivet P/N CR3213

(b) Visuallyexaminethefairingunitfordamage.

1 Ifthereistearingordelaminationofthecompositematerial,returnthe fairing unit to Hartzell Propeller Inc.

(c) Using a rivet fasten the tab to the fairing unit.

1 Visuallyexaminethenewlyinstalledrivettomakesurethattheheadsof the rivet are tight to the fairing unit.

5. Lightning Strike

A. Refer to the Lightning Strike Inspection section in the Repair Limits chapter of this manual.

FINISH PROCEDURES - CONTENTS

1. For Areas of Paint Damage 5 Square Inches or Less ................................................ 3-3A. General ................................................................................................................ 3-3B. Option #1 - Polane Finish Coating ....................................................................... 3-3C. Option #2 - Aerosol Finish Coating ...................................................................... 3-4D. Acry Glo® Series 571 Paint Finish ........................................................................ 3-5E. Acry Glo® Series 571 Paint Finish for Metallic H Code Colors (only) ......................... 3-5

2. For Areas of Paint Damage Greater than 5 Square Inches ..................................... 3-18A. General .............................................................................................................. 3-18B. Paint Removal .................................................................................................... 3-18C. Masking .............................................................................................................. 3-19D. Wash Primer (Mixture Number 3) ...................................................................... 3-20E. Primer Filler (Mixture Number 1) ........................................................................ 3-21F. Minor Blemish Correction ................................................................................... 3-22G. Primer Sealer (Mixture Number 2) ..................................................................... 3-23H. Conductive Coating (Mixture Number 13) .......................................................... 3-25I. Finish Paint ........................................................................................................ 3-26J. Paint Inspection ................................................................................................. 3-34K. Erosion Mask Installation ................................................................................... 3-35L. Resistance Check of the Dome ......................................................................... 3-38M. Resistance Check of the Bulkhead .................................................................... 3-41N. Resistance Check of the Fairing Unit ................................................................. 3-44

LIST OF FIGURES

Resistance Check of the Dome ...............................................Figure 3-1 ..................... 3-37

Resistance Check of the Bulkhead..........................................Figure 3-2 ..................... 3-39

Resistance Check of the Bulkhead..........................................Figure 3-3 ..................... 3-40

Resistance Check of the Fairing Unit ......................................Figure 3-4 ..................... 3-43


173

Page 3-1Rev. 7 May/1761-10-73FINISH PROCEDURES

FINISH PROCEDURES - CONTENTS, CONTINUED

LIST OF TABLES

Finish Procedures....................................................................Table 3-1 ......................... 3-6

Consumables and Applicability ................................................Table 3-2 ....................... 3-16

Acry Glo® Series 571 Reducer Components and Blend Requirements...........................................................Table 3-3 ....................... 3-28

Resistance Check of the Bulkhead..........................................Table 3-4 ....................... 3-41


173


1. For Areas of Paint Damage 5 Square Inches or LessA. General

(1) Polanefinishcoatingisamoredurablecoatingthantheaerosolfinishcoating;buttheAerosolfinishcoatingisaquickerprocessandisanacceptableoptionfor time constraints.

(2) This procedure may be performed on all damaged paint for areas up to 5 square inches (3225.5 square mm) of exposed composite material or to refinisharepairedareasmallerthan5squareinches(3225.5squaremm).

(3) Makesurethattheareatoberefinishedissandedsmoothandthattheoriginalcoatings, left on the part, are feathered out from the repair.

CAUTION: DO NOT REMOVE SPINNER MATERIAL. IF SPINNER MATERIAL IS REMOVED, THE SPINNER MUST BE REPAIRED IN ACCORDANCE WITH THE GOUGE OR LOSS OF COMPOSITE MATERIAL PROCEDURE IN THE MINOR REPAIR CHAPTER OF THIS MANUAL.

(4) Using180gritsandpaperorfiner,feathertheexistingcoatingsawayfromtheeroded or repaired area.

B. Option #1 - Polane Finish Coating

(1) Ifnecessary,applyPrimerFiller(MixNumber1)inaccordancewithsection"PrimerFiller(MixNumber1)"inthischaptertofillsmallblemishesandtostiffenlargeareasofpronouncedfibersthathavebeenexposedduringtherepair and sanding operations.

NOTE: PrimerFiller(MixNumber1)willstiffenandsupportpronouncedfiberssothattheycanberemoved,atthesurfaceofthefiller,duringsanding.

(2) If necessary, perform the "Minor Blemish Correction" procedure in this chapter, tofillsmallblemishesandtostiffensmallareasofpronouncedfibersthathavebeen exposed during the repair and sanding operations.

NOTE: TheMinorBlemishCorrectionprocedurewillstiffenandsupportpronouncedfiberssothattheycanberemovedatthesurfaceduringsanding.

(3) Perform the "Primer Sealer (Mix Number 2)" application procedure in this chapter to the repaired area.

(4) After the Primer Sealer (Mix Number 2) has cured, sand to leave coverage over the repair and the exposed original sealer layer.


173


CAUTION 1: APPLY FINISH COATING ONLY TO THE DEGREE REQUIRED TO UNIFORMLY COVER THE REPAIR/EROSION. AVOID EXCESSIVE PAINT BUILDUP TO AVOID CHANGING THE P-STATIC CHARACTERISTICS.

CAUTION 2: DO NOT APPLY MASKING MATERIAL TO THE SURFACE OF THE SPINNER AROUND THE REPAIR AREA DURING THE FINAL COATING APPLICATIONS.

(5) Applytheapplicablefinishcoatingtoachieve2to4milthickwhendry.

C. Option #2 - Aerosol Finish Coating

WARNING: ADHESIVES AND SOLVENTS ARE FLAMMABLE AND TOXIC TO THE SKIN, EYES, AND RESPIRATORY TRACT. SKIN AND EYE PROTECTION ARE REQUIRED. AVOID PROLONGED CONTACT AND BREATHING OF VAPORS. USE SOLVENT RESISTANT GLOVES TO MINIMIZE SKIN CONTACT AND WEAR SAFETY GLASSES FOR EYE PROTECTION. USE IN A WELL VENTILATED AREA AWAY FROM SPARKS AND FLAME. READ AND OBSERVE ALL WARNING LABELS.

(1) If necessary, perform the "Minor Blemish Correction" procedure in this chapter, tofillsmallblemishesandtostiffensmallareasofpronouncedfibersthathavebeen exposed during the repair and sanding operations.

NOTE: The"MinorBlemishCorrection"procedurewillstiffenandsupportpronouncedfiberssothattheycanberemovedatthesurfaceduringsanding.

(2) UsingacleanclothdampenedwithsolventacetoneCM173,MEKCM106,orMPKCM219,wipethesurfaceofthespinner.

(3) Permit the solvent to dry.

CAUTION 1: APPLY FINISH COATING ONLY TO THE DEGREE REQUIRED TO UNIFORMLY COVER THE REPAIR/EROSION. AVOID EXCESSIVE PAINT BUILDUP TO AVOID CHANGING THE P-STATIC CHARACTERISTICS.

CAUTION 2: DO NOT APPLY MASKING MATERIAL TO THE SURFACE OF THE SPINNER AROUND THE REPAIR AREA DURING THE FINAL COATING APPLICATIONS.

(4) Applyalayeroftheapplicablefinishcoatingtoachieve2to4milthicknesswhendry.

(5) Applyadditionallayersoffinishcoatingbefore30minutes,orafter48hours.


173


D. Acry Glo® Series 571 Paint Finish

NOTE: LocalrefinishingwithAcryGlo® Series 571 paint is not recommended.

(1) Sand the Acry Glo® Series 571 paint layers from the entire part.

(2) Sand the conductive coating layer if applicable from the entire part.

CAUTION: APPLY ACRY GLO® SERIES 571 PAINT ONLY TO THE DEGREE REQUIRED TO UNIFORMLY COVER THE PART. AVOID EXCESSIVE PAINT BUILDUP TO AVOID CHANGING THE PROFILE OF THE PART AND/OR THE CONDUCTIVE COATING CHARACTERISTICS.

(3) Repaintthepartinaccordancewiththefinishprocedures,asindicatedin Table 3-1 in this chapter.

(a) Optionally,theprimerfillerandtheprimersealermaybeappliedonlytotheareasnecessarytoblendtotheexistingprimerfillerandprimersealerlayers.

E. Acry Glo® Series 571 Paint Finish for Metallic H Code Colors (only)

(1) Sand the Acry Glo® Series 571 paint layers from the entire part.

(2) Sand the conductive coating layer if applicable from the entire part.

CAUTION: APPLY ACRY GLO® SERIES 571 PAINT FOR METALLIC H CODE COLORS ONLY TO THE DEGREE REQUIRED TO UNIFORMLY COVER THE PART. AVOID EXCESSIVE PAINT BUILDUP TO AVOID CHANGING THE PROFILE OF THE PART AND/OR THE CONDUCTIVE COATING CHARACTERISTICS.

(3) Repaintthepartinaccordancewiththefinishprocedures,asindicatedin Table 3-1 in this chapter.


173


Finish Sequence

Finish Procedure

Spinner Assembly D-5253-( )



Dome D-5263

Bulkhead D-5264

Dome D-5312-( )

Bulkhead D-5313-( )

Dome D-5363

Bulkhead D-5364

1 Masking --- --- --- --- --- ---

2 Primer Filler X X X X X X

3

Minor Blemish

Correction See NOTE 1

X X X X X X

4 Primer Sealer X X X X X X

5 Conductive Coating --- --- --- --- --- ---

6 Masking Instruction 2 --- --- --- --- --- ---

7 Wash Primer --- --- --- --- --- ---

8 Primer Sealer --- --- --- --- --- ---

9 Finish Paint See NOTE 2

Instruction 1

Instruction 1

Instruction 1

Instruction 1

Instruction 1

Instruction 1

10 Paint Inspection X X X X X X

11Dome

Resistance Check

--- --- --- --- --- ---

12Bulkhead

Resistance Check

--- --- --- --- --- ---

13Erosion Mask Removal and

Installation--- --- --- --- --- ---

14 Identification X X X X X X

NOTE 1: The steps in the section, "Minor Blemish Correction" in this chapter may be performed at any time during the Primer Filler or Primer Sealer procedures.

NOTE 2: Any Hartzell Propeller Inc. approved Polane® T or Acry Glo® Series 571 (includingmetallic,Hcode)paintcolorsmaybeusedasfinishpaintforthesecomponents.

Finish Procedures Table 3-1


173


Finish Sequence

Finish Procedure

Spinner Assembly E-5579-( )


Spinner Assembly E-7480-( )

Dome E-5580-( )

Bulkhead E-5581

Dome D-7408

Bulkhead D-7404

Dome E-7481

Bulkhead D-6666

1 Masking Instruction 1

Instruction 2

Instruction 2

Instruction 2

Instruction 2

Instruction 3

2 Primer Filler X X X X X X

3

Minor Blemish


X X X X X X

4 Primer Sealer X X X X X X

5 Conductive Coating --- --- --- --- --- ---

6 Masking Instruction 2 --- --- --- --- --- ---

7 Wash Primer --- --- --- --- --- ---

8 Primer Sealer --- --- --- --- --- ---


Instruction 1

Instruction 1

Instruction 1

Instruction 1

Instruction 1

Instruction 2


11Dome

Resistance Check

X --- X --- X ---

12Bulkhead

Resistance Check

--- X --- X --- X

13Erosion Mask Removal and Installation

X --- --- --- X ---




Finish Procedures Table 3-1, Continued


173



Finish Sequence

Finish Procedure

Spinner Assembly 101298

Spinner Assembly 102870( )


Dome 101299

Bulkhead D-7084-1G

Dome 102885( )

Bulkhead 102892

Dome 103410( )

Bulkhead C-2472-6( )

1 Masking --- --- --- --- --- ---

2 Primer Filler X --- X X X ---

3

Minor Blemish


X --- X X X ---

4 Primer Sealer X --- X X X ---

5 Conductive Coating --- --- X --- X ---

6 Masking Instruction 2 --- X --- --- X X

7 Wash Primer --- X --- --- --- X

8 Primer Sealer --- --- --- --- X ---


Instruction 1

Instruction 1

Instruction 1

Instruction 1

Instruction 1

Instruction 1


11Dome

Resistance Check

X --- X --- X ---

12Bulkhead

Resistance Check

--- --- --- X --- ---


--- --- --- --- --- ---





173



Finish Sequence

Finish Procedure



Dome 103582( )

Adapter Ring

103584( )

Filler Plate 103583 or

104001

Dome 103627( )

Adapter Ring 103628( )

1 Masking --- --- --- --- ---

2 Primer Filler X --- X X ---

3

Minor Blemish


X --- X X ---

4 Primer Sealer X --- X X ---

5 Conductive Coating X --- X X ---

6 Masking Instruction 2 X X X X X

7 Wash Primer --- X --- --- X

8 Primer Sealer X --- X X ---


Instruction 1

Instruction 1

Instruction 1

Instruction 1

Instruction 1

10 Paint Inspection X X X X X

11Dome

Resistance Check

X --- X X ---

12Bulkhead

Resistance Check

--- --- --- --- ---


--- --- --- --- ---

14 Identification X X X X X


NOTE 2: Any Hartzell Propeller Inc. approved Polane® T or Acry Glo® Series 571 (including metallic,Hcode)paintcolorsmaybeusedasfinishpaintforthesecomponents.


173



Finish Sequence

Finish Procedure


Spinner Assembly 104888-( )

Dome 104573

Bulkhead 104572

Fairing Unit 104571

(Does Not Include the

Tab)

Fairing Unit 104571(For the

Tab Only)

Dome 104886-( )

Bulkhead 104887

1 Masking --- --- --- --- --- ---

2 Primer Filler X X X --- X ---

3

Minor Blemish


X X X --- X ---

4 Primer Sealer X X X --- X ---

5 Conductive Coating X --- X X X ---

6 Masking Instruction 2 --- --- --- X X X

7 Wash Primer --- --- --- X --- X

8 Primer Sealer --- --- --- --- X ---


Instruction 1

Instruction 1

Instruction 1

Instruction 1

Instruction 1

Instruction 1


11Dome

Resistance Check

--- --- --- --- X ---

12Bulkhead

Resistance Check

X XFairing Unit Resistance

Check--- --- ---


--- --- --- --- --- ---





173



Finish Sequence

Finish Procedure




Dome 105122( )

Bulkhead 105123( )

Dome 105129( )

Bulkhead 106015( )

Dome 105651( )

Bulkhead 105652( )

1 Masking --- --- --- --- --- ---

2 Primer Filler X X X X X ---

3

Minor Blemish


X X X X X ---

4 Primer Sealer X X X X X ---

5 Conductive Coating X --- X --- X ---

6 Masking Instruction 2 --- --- --- --- --- X

7 Wash Primer --- --- --- --- --- X

8 Primer Sealer --- --- --- --- --- ---


Instruction 1

Instruction 1

Instruction 1

Instruction 1

Instruction 1

Instruction 1


11Dome

Resistance Check

X --- X --- X ---

12Bulkhead

Resistance Check

--- X --- X --- ---


--- --- --- --- --- ---





173



Finish Sequence

Finish Procedure



Dome 105674

Bulkhead 105672

Dome 105943( )

Adapter Ring 105944( ) or C-885-3

Filler Plate 104001

1 Masking --- --- --- --- ---

2 Primer Filler X --- X --- X

3

Minor Blemish


X --- X --- X

4 Primer Sealer X --- X --- X

5 Conductive Coating X --- X --- X

6 Masking Instruction 2 --- X X X X

7 Wash Primer --- X --- X ---

8 Primer Sealer --- --- X --- X


Instruction 1

Instruction 1

Instruction 1

Instruction 1

Instruction 1

10 Paint Inspection X X X X X

11Dome

Resistance Check

X --- X --- X

12Bulkhead

Resistance Check

--- --- --- --- ---


--- --- --- --- ---

14 Identification X X X X X




173



Finish Sequence

Finish Procedure




Dome 106039( )

Bulkhead 106348( )

Dome 106184( )

Bulkhead 106185( )

Dome 106214( )

Bulkhead C-2472-6( )

1 Masking --- --- --- --- --- ---


3

Minor Blemish


X --- X X X ---


5 Conductive Coating X --- X --- X ---

6 Masking Instruction 2 --- X --- --- X X

7 Wash Primer --- X --- --- --- X

8 Primer Sealer --- --- --- --- X ---


Instruction 1

Instruction 1

Instruction 1

Instruction 1

Instruction 1

Instruction 1


11Dome

Resistance Check

X --- X --- X ---

12Bulkhead

Resistance Check

--- --- --- X --- ---


--- --- --- --- --- ---





173


Finish Sequence

Finish Procedure




Dome 106322( )

Bulkhead 106323( )

Dome 103582( )

Bulkhead 106573( )

Dome 106847( )

Bulkhead 106348( )

1 Masking --- --- --- --- --- ---

2 Primer Filler X X X --- X ---

3

Minor Blemish


X X X --- X ---

4 Primer Sealer X X X --- X ---

5 Conductive Coating X --- X --- --- ---

6 Masking Instruction 2 --- --- X X --- X

7 Wash Primer --- --- --- X --- X

8 Primer Sealer --- --- X --- --- ---


Instruction 1

Instruction 1

Instruction 1

Instruction 1

Instruction 1

Instruction 1


11Dome

Resistance Check

X --- X --- X ---

12Bulkhead

Resistance Check

--- X --- --- --- ---


--- --- --- --- --- ---



NOTE 2: Any Hartzell Propeller Inc. approved Polane® T or Acry Glo® Series 571 (including metallic, Hcode)paintcolorsmaybeusedasfinishpaintforthesecomponents.



173


Finish Sequence

Finish Procedure



Dome 106911( )

Bulkhead 106910( )

Dome 106956( )

Bulkhead 106955( )

Fairing Unit 104571

(Does Not Include the

Tab)

Fairing Unit 104571(For the

Tab Only)

1 Masking Instruction 2 --- --- --- --- ---


3

Minor Blemish


X --- X X X ---


5 Conductive Coating --- --- X --- X X

6 Masking Instruction 2 --- X --- --- --- X

7 Wash Primer --- X --- --- --- X

8 Primer Sealer --- --- --- --- --- ---


Instruction 1

Instruction 1

Instruction 1

Instruction 1

Instruction 1

Instruction 1


11Dome

Resistance Check

X --- X --- --- ---

12Bulkhead

Resistance Check

--- --- --- XFairing Unit Resistance

Check---


--- --- --- --- --- ---



NOTE 2: Any Hartzell Propeller Inc. approved Polane® T or Acry Glo® Series 571 (including metallic, Hcode)paintcolorsmaybeusedasfinishpaintforthesecomponents.



173


Part Number CM Number

Description Quantity Applicability

Paint Primed

Components

RefinishPainted

ComponentsN/A N/A Sandpaper,60gritorfiner(removal) A/R xN/A N/A Sandpaper,400grit(betweenlayers) A/R x xN/A CM159 Cheesecloth, or equivalent A/R x xAlternates Listed Solvent - use one of these alternates A/R x x

N/A CM173 Solvent - Acetone A/RN/A CM106 Solvent - Methyl Ethyl Ketone (MEK) A/RN/A CM219 Solvent - Methyl Propyl Ketone (MPK) A/R

Mix #1 Primer Filler, Polane 2.8 Plus A/R xA-6741-84(-1) CM84 Spray Fill 6 partsA-6741-85(-1) CM85 Catalyst 1 partA-6741-32(-1) CM32 Polane Reducer (25% maximum) A/R

Mix # 2 Primer Sealer, Grey A/R xA-6741-29(-1) CM29 Primer Sealer 13 partsA-6741-30(-1) CM30 Catalyst 1 partA-6741-32(-1) CM32 Polane Reducer (3.25 parts maximum) A/RA-6741-31(-1) CM31 Accelerator A/R

Mix #3 Wash Primer A/RNOTE:TheHartzellPropellerInc.requiredmixratioisasshownhere.Themixratiodiffersfromthe manufacturer's label. Make sure to use the mix ratio that is specifed by Hartzell Propeller Inc.

A-6741-24 CM24 Wash Primer 4 partsA-6741-25 CM25 Reducer, Wash Primer 4 partsA-6741-26 CM26 Acid Diluent 1 part

Mix #13 P-Static, Conductive Coating A/R xA-2328-13 CM164 Kit, quart (contains base & activator) -A-6741-164-5 CM164 Conductive Coating Base, Black 1 partA-6741-164-6 CM164 Conductive Coating Activator 1 part

Finish Paint Polane T®Paint-seebelow x xA-6741-( ) CM( ) Polane T® Paint 6 partsA-6741-30 CM30 Catalyst 1 partA-6741-32 CM32 Polane Reducer, as required to achive

desired dry thickness1 - 3 parts

A-6741-31 CM31 Accelerator A/R

Consumables and Applicability Table 3-2


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Consumables and Applicability Table 3-2, Continued

Part Number CM Number

Description Quantity Applicability

Paint Primed

Components

RefinishPainted

ComponentsFinish Paint Acry Glo®Series571Paint-seebelow x x

A-6741-282 OR A-6741-291 OR ------------------

CM282 CM291 ---------

Acry Glo® Series 571 Matterhorn White (Mix 15) Acry Glo® Series 571 Sterling Silver Metallic (H code) (Mix 25) -or use any Acry Glo® Series 571 color

3 parts

A-6741-283 CM283 Catalyst-withNON-metallicpaint 1 partA-6741-283 CM283 Catalyst-withmetallicpaint 1/2 partA-6741-292 CM292 Acry Glo® Stabilizer-withmetallic

(H code) paints only1/2 part

A-6741-( ) Table 7-3

Reducer (Blended, refer to Table 7-3) A/R

A-6741-288 Table 7-3

Reducer (Urethane Grade MEK) A/R

A-6741-287 CM287 Accelerator A/RA-6741-290 CM290 Acry Glo® ConventionalClear-with

metallic (H code) paints only (Mix 26)A/R


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2. For Areas of Paint Damage Greater than 5 Square Inches

CAUTION: DO NOT APPLY MIXTURES WHEN THE ROOM TEMPERATURE IS LESS THAN 60° F (15° C).

A. General(1) When applying a mixture, make sure that the room temperature is 60° F (15° C)

or above.(2) For special instructions, recommendations, mixture proportions, and other

information, refer to Table 3-2 Consumables and Applicability.(3) The steps in the section "Minor Blemish Correction" in this chapter may be

performed at any time during the Primer Filler or Primer Sealer procedures.(4) Forthefinishproceduresapplicabletoeachspinnerassembly,referto

Table 3-1 Finish Procedures in this chapter.(a) The"X"markindicatesthatthefinishprocedureisapplicableforthe

spinner assembly model indicated.(5) Makesuretofollowthefinishsequenceandthepaintthicknessrequirements.

(a) Thefinishsequenceandthepaintthicknessareimportantforstaticdissipation.

(b) Too much paint, too many layers of paint, or paint layers applied in the incorrectsequencewillaffectthestaticdissipationpropertyofthepart.

B. Paint Removal

CAUTION 1: KEEP THE SANDER MOVING AT ALL TIMES TO PREVENT OVERHEATING AND RESULTING PART DAMAGE. DOME AND BULKHEAD MATERIALS ARE VERY THIN IN CERTAIN AREAS. REMOVAL OF MATERIAL MAY AFFECT THE STRENGTH OF THE PART.

CAUTION 2: FOR SPINNER MODEL E-5579-( ), THE DOME HAS AN EROSION CAP. USE CARE WHEN REMOVING PAINT IN THIS AREA TO NOT REMOVE EROSION CAP MATERIAL.

(1) For a spinner that has Polane®Tpaintfinish:(a) Using60gritorfinersandpaper,sandsmooththeentiresurfaceofthepart

downtotheprimerfiller.Donotremovecompositematerial.(2) For a spinner that has Acry Glo®Series571paintfinish:

(a) Using60gritorfinersandpaper,sandsmooththeentiresurfaceoftheparttothelastlayerbeforethecompositematerial(thewhitelayerbelowtheblackconductive coating).

1 Refer to Table 3-1, Finish Procedures for the applicable Finish layers.NOTE: Primer Sealer (Finish Sequence 4 and 8) may not be

present in factory finished components.


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C. Masking

NOTE: Forthefinishproceduresapplicabletoeachspinnerassembly,refertoTable 3-1 Finish Procedures in this chapter.

(1) Instruction 1

(a) Apply masking material, for example tape, paper, or shields, as required to restrict overspray.

NOTE: Ascrewandwashercombinationisagoodshieldformaskingascrewhole.

(b) Apply masking material to the dome erosion shield.

(c) Applymaskingmaterialateachscrewholeinthedomeandeachscrewhole in the bulkhead.

(d) Remove masking materials if used, before applying paint.

(2) Instruction 2



(b) Apply masking material of approximately 0.625 inch (15.87 mm) diameter ateachscrewholeinthedomeandateachscrewholeinthebulkheadoradapter ring.

(3) Instruction 3



(b) On the smooth side of the bulkhead: Apply masking material of approximately 0.625 inch (15.87 mm) diameter ateachmountingscrewholeinthebulkhead.

(c) On the rough side of the bulkhead: Using 280 grit sandpaper, sand the bulkhead mounting surface by hand to fully scuff the surface.

NOTE: The bulkhead mounting surface is the raised surface adjacent to the ID on the rough side of the bulkhead.

(d) On the rough side of the bulkhead: Apply masking material to cover the part number and serial number.


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D. Wash Primer (Mixture Number 3)


(1) General

CAUTION: DO NOT USE WASH PRIMER (MIXTURE NUMBER 3) ON A COMPOSITE PART.

(a) Wash Primer is used before painting on the metal bulkhead or the adapter ring unit of a hybrid spinner.

(2) Application


(a) Preparewashprimer(MixtureNumber3)inaccordancewiththemixtureproportionsspecifiedinTable3-2ConsumablesandApplicability.

(b) UsingcleancheeseclothCM159orequivalentdampenedwithsolvent acetoneCM173,MEKCM106,orMPKCM219,wipeallsurfacesto be painted.

(c) Permit the solvent acetone CM173, MEK CM106, or MPK CM219 to dry completely.

(d) Applyalightlayerofwashprimer(MixtureNumber3)onthesurfaceto be painted.

(e) Permitthewashprimer(MixtureNumber3)todryforapproximately fiveminutes.


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E. Primer Filler (Mixture Number 1)

NOTE 1: Forthefinishproceduresapplicabletoeachspinnerassembly,refertoTable 3-1 Finish Procedures in this chapter.

NOTE 2: Itisnotnecessarytoapplyprimerfillertotheroughsideofthebulkhead.

(1) General

NOTE: Primer Filler (Mixture Number 1) is not used for the metal bulkhead or the adapter ring unit of a hybrid spinner assembly.

(a) Theprimarypurposeofthislayeristofillsmallpitsandblemishesinthecomposite part surface.

1 Ifthesurfaceissufficientlysmooth,theprimerfillerproceduremaybeusedonlywherenecessary,oromittedentirely.

(b) Recommended Film Thickness

1 Applyaminimumthicknessforfillingpitsandblemishes.

(c) The steps in the section "Minor Blemish Correction" in this chapter may be performed at any time during the Primer Filler procedure.

(2) Application


(a) Prepareprimerfiller(MixtureNumber1)inaccordancewiththemixtureproportionsspecifiedinTable3-2ConsumablesandApplicability.

(b) UsingcleancheeseclothCM159orequivalentdampenedwithsolvent acetoneCM173,MEKCM106,orMPKCM219,wipethesurfacesof the composite part.

(c) Permit the solvent acetone CM173, MEK CM106, or MPK CM219 to dry completely.

CAUTION: DO NOT APPLY PRIMER FILLER IN THE DOME MOUNTING HOLES OF THE DOME OR THE BULKHEAD.

(d) Rollalightlayerofprimerfiller(MixtureNumber1)onthesurface of the composite part.

(e) Permittheprimerfiller(MixtureNumber1)todryforthreetofourhoursatroom temperature (65° to 77° F/18° to 25° C) or one (1) hour at 140° to 150° F (60° to 65.5° C).


173


CAUTION: USE CAUTION WHEN SANDING NOT TO REMOVE COMPOSITE MATERIAL. THE LAMINATE IS THIN AND THE STRENGTH OF THE STRUCTURE MAY BE COMPROMISED IF COMPOSITE MATERIAL IS REMOVED.

(f) Usingavibratorysanderwith150gritsandpaper,lightlysandtheentiresurfacearea,leavingaminimumthicknessforfillingpitsandblemishesonly,whileremovingasmuchprimerfiller(MixtureNumber1)aspossible.

F. Minor Blemish Correction


NOTE 2: It is not necessary to correct blemishes on the rough side of the bulkhead.(1) General

NOTE: Minor Blemish Correction is not used for the metal bulkhead or the adapter ring unit of a hybrid spinner assembly.

(a) Thepurposeofthisprocedureistofillsmallpitsandblemishes in the composite spinner surface that the layer of Primer Filler (MixtureNumber1)didnotfill.

(b) The steps in this section may be performed at any time during the Primer Filler or Primer Sealer procedures.

(2) Procedure


(a) Apply a small amount of adhesive CM71 to the blemish area (pitting, pin-holes, etc.).

(b) Quickly remove the excess adhesive CM71 and immediately apply a small amount of talc CM72.

(c) Permit the adhesive CM71 to dry.(d) Sand the area smooth using the appropriate grit sandpaper and

equipmentforthestageoffinishbeingaccomplished.(e) UsingcleancheeseclothCM159orequivalentdampenedwithsolvent

acetoneCM173,MEKCM106,orMPKCM219,wipethepart.(f) Permit the solvent acetone CM173, MEK CM106, or MPK CM219 to dry.(g) Repeat the procedure as necessary to make sure of smoothness.


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G.. Primer Sealer (Mixture Number 2)NOTE 1: Forthefinishproceduresapplicabletoeachspinnerassembly,referto

Table 3-1 Finish Procedures in this chapter.

NOTE 2: It is not necessary to apply primer sealer to the rough side of the bulkhead.

(1) GeneralNOTE: Primer Sealer (Mixture Number 2) is not used for the metal bulkhead

or the adapter ring unit of a hybrid spinner assembly.(a) Recommended Film Thickness

1 Twolayersmeasuringatotalofapproximately2milswhendry.(b) The steps in the section "Minor Blemish Correction" in this chapter may be

performed at any time during the Primer Sealer procedure.(2) Application


(a) Prepareprimersealer(MixtureNumber2)inaccordancewiththemixtureproportionsspecifiedinTable3-2ConsumablesandApplicability.

(b) UsingcleancheeseclothCM159orequivalentdampenedwithsolvent acetoneCM173,MEKCM106,orMPKCM219,wipeallsurfacesof the part to be painted.

(c) Permit the solvent acetone CM173, MEK CM106, or MPK CM219 to dry.(d) Spray one layer of primer sealer (Mixture Number 2) over the part,

nothickerthan2milswhendry.(e) Ifanypronouncedfibersarepresent:

1 Permit the primer sealer (Mixture Number 2) to dry.

(a) Dry at room temperature (65° to 77° F/18° to 25° C) until the part can be successfully sanded.

(b) Optionally, heat cure in an oven at 140° F +10° F (60° C +5.6° C) for approximately one (1) hour.

2 Lightly sand the affected area.

3 UsingcleancheeseclothCM159orequivalentdampenedwithsolventacetoneCM173,MEKCM106,orMPKCM219,wipetheaffected area.


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4 Permit the solvent acetone CM173, MEK CM106, or MPK CM219 to dry.

5 Perform "Minor Blemish Correction" in this chapter if necessary.

6 UsingcheeseclothCM159orequivalentdampenedwithsolventacetoneCM173,MEKCM106,orMPKCM219,wipetheaffectedarea.

7 Permit the solvent acetone CM173, MEK CM106, or MPK CM219 to dry.

8 Apply Primer Sealer (Mixture Number 2) to the affected area.

9 Repeat the steps 2.E(2)(e)1 through 2.E(2)(e)8 as necessary until the surface quality of the part is satisfactory.

(f) Spray a second layer of primer sealer (Mixture Number 2) over the part.(g) Permit the primer sealer (Mixture Number 2) to dry for at least

one (1) hour at room temperature (65° to 77° F/18° to 25° C) before applying additional layers.1 Before sanding, up to eight (8) hours of drying time may be required,

depending on environmental conditions.2 Optionally, the primer sealer (Mixture Number 2) may be heat cured

in an oven at 140° F +10° F (60° C +5.6° C). Typically, one hour is sufficienttimefortheheatcure.

(h) Using 400 grit sandpaper, hand sand the surface until it has the desired finishandtheprimersealer(MixtureNumber2)isnothickerthan2mils.

(i) Remove the masking material if applicable.(j) Examinethefinishforsmoothness.

1 Repeat the applicable steps in this section as required to achieve thedesiredsurfacequalitywhilemaintainingtherecommendedfilmthickness and coverage.


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H. Conductive Coating (Mixture Number 13)


CAUTION 1: DO NOT APPLY CONDUCTIVE COATING (MIXTURE NUMBER 13) UNLESS IT WILL BE COVERED BY AN ADDITIONAL COATING WITHIN 4 HOURS.

CAUTION 2: DO NOT SAND CONDUCTIVE COATING (MIXTURE NUMBER 13) BECAUSE SANDING MAY DAMAGE THE STATIC PATH.

(1) General

NOTE: Conductive Coating (Mixture Number 13) is not used for the metal bulkhead or the adapter ring unit of a hybrid spinner assembly.

(a) Recommended Film Thickness

1 Twolayersmeasuringatotalofapproximately0.6to1.0milwhendry.

(2) Application


(a) Prepare the conductive coating (Mixture Number 13) in accordance withthemixtureproportionsspecifiedinTable3-2ConsumablesandApplicability.

(b) UsingcheeseclothCM159orequivalentdampenedwithsolvent acetoneCM173,MEKCM106,orMPKCM219,wipeallsurfacesof the part to be painted.

(c) Permit the solvent acetone CM173, MEK CM106, or MPK CM219 to dry.

(d) Spray one layer of conductive coating (Mixture Number 13) over the entire surface.

CAUTION: CONDUCTIVE COATING (MIXTURE NUMBER 13) MUST BE COVERED BY AN ADDITIONAL COATING WITHIN FOUR (4) HOURS.

(e) Permit the conductive coating (Mixture Number 13) to cure a maximum of four (4) hours before applying any additional coating.


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I. Finish Paint

CAUTION 1: REFINISHING THE COMPOSITE SPINNER DOME AND FILLER PLATES CAN ALTER THE P-STATIC DISSIPATION OF THESE COMPONENTS. IMPROPER P-STATIC DISSIPATION COULD LEAD TO DISTORTION OR DAMAGE OF THE ELECTRONIC COMPONENTS IN THE AIRCRAFT, INCLUDING NAVIGATIONAL EQUIPMENT.

CAUTION 2: DO NOT APPLY ADDITIONAL PAINT OVER THE EXISTING MANUFACTURER'S FINISH. ADDITIONAL LAYERS OF PAINT APPLIED OVER THE P-STATIC COATING WILL AFFECT THE DISSIPATION OF STATIC ELECTRICITY.


NOTE 2: If Acry Glo® Series 571 paint is desired, refer to "Acry Glo® Series 571 Paint" in this section.

(1) Instruction 1(a) Use of alternate top coat paint

1 Hartzell Propeller Inc. has performed testing and has practical experience onlywithPolane® T and Acry-Glo® paints as the spinner top coat.a Based on this experience, Hartzell Propeller Inc. highly

recommends using Polane® T or Acry-Glo®paintswhenpossible.

2 An alternate paint other than Polane® T or Acry-Glo® paint can be applied as a top coat on a spinner at the OEM or at an overhaul/repairfacility;howeveritmustbeappliedovertheHartzellrequiredprimer/P-static paint and is limited to a maximum thickness of 4 mils.

3 Regardless of the type of top coat paint applied, the application of primer and P-static layers to the spinner must meet Hartzell Propeller'sexistingspecificationstosatisfybothelectricalandUVprotection requirements.

4 HartzellPropellerInc.acceptsnoresponsibilityforwear,peeling,orother problems related to the application of any alternate paints.

(b) Polane® T Paint1 General

a Recommended Film Thickness(1) Two(2)layersofPolane®Tpaintmeasuringatotalof

2to4milswhendry.(a) The maximum accumulated thickness of primer sealer,

paint,andclearcoat(ifapplicable)is7milswhendry.


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b The curing time of paint for maximum abrasion resistance and impact strength is seven (7) days.

c AspinnerpartmaybepaintedwithanyapprovedPolane® T paint mixture. For approved Polane® T paint mixtures, refer to Table 3-2 Consumables and Applicability.

d Before applying Polane® T paint, remove any masking material, if used, from the erosion shield of the E-5580-( ) dome.

2 Application

a PreparethedesiredpaintmixtureinaccordancewiththemixtureproportionsspecifiedinTable3-2ConsumablesandApplicability.

b UsingcheeseclothCM159orequivalentdampenedwithsolvent acetoneCM173,MEKCM106,orMPKCM219,wipeallsurfaces of the part to be painted.

c Permit the solvent acetone CM173, MEK CM106, or MPK CM219 to dry.

d Painttheentiresurfacewiththespecifiedpaintmixusingasmooth, even spraying motion in three passes until the entire surface to be painted is covered.NOTE: Three (3) passes of paint over the surface is

considered to be one layer of paint.

e Permitthepaintedsurfacetodryinaccordancewiththepaintmanufacturer's instructions until it is dry to the touch.

(1) For adequate layer-to-layer paint adhesion, the maximum timebetweencoatsofpaintisfour(4)hours.

(2) If it has been longer than four (4) hours since the previous layerofpaintwasapplied:(a) Using 400 grit sandpaper, lightly sand the cured

surface.(b) Usingclean,drycheeseclothCM159orequivalent,wipe

the sanded cured surface before applying a subsequent layer of paint.

f Repeat the paint application using three (3) passes to apply a second layer of paint, making sure that the surface of the part is fully covered.

g Ifthepartwillbeput in an airtight plastic bag, cure the part for a minimum of 24 hours.


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Temperature Reducer Component Part Number

CM Number

Component Blend (humidity 65% or less)

Component Blend (humidity greater than 65%)

60-70°F (16-21°C)A-6741-285 CM285 100% 75%

A-6741-288 CM288 0% 25%

70-80°F (21-27°C)A-6741-284 CM284 100% 75%

A-6741-288 CM288 0% 25%

80-90°F (27-32°C)

A-6741-284 CM284 90-95% 67.3-71.25%

A-6741-286 CM286 3-10% 3.73-7.5%

A-6741-288 CM288 0% 25%

90°F+ (32°C+)

A-6741-284 CM284 73-90% 56.23-67.5%

A-6741-286 CM286 10-25% 7.3-18.75%

A-6741-288 CM288 0% 25%

Acry Glo® Series 571 Reducer Components and Blend Requirements Table 3-3


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(c) Acry Glo® Series 571 Paint

1 General

a Recommended Film Thickness

(1) ThemaximumpermittedfilmthicknessoftheAcryGlo® Series571paintis2milswhendry.

(a) The maximum accumulated thickness of primer sealer, paint, and clear coat (if applicable) is 7 mils whendry.


c Aspinnermaybepaintedwithanyapproved Acry Glo® Series 571 paint mixture. For approved Acry Glo® Series 571 paint mixtures, refer to Table 3-2 and Table 3.3.

(1) The mix of paint, catalyst, reducer, accelerator, and stabilizer (for metallic H code colors only) applies to all colors of Acry Glo® Series 571 paint (including metallic, H code colors). Refer to Table 3-2 for the list of applicable consumables.

(2) ContactanySherwinWilliams® location to identify a local distributorforaircraftpaint(fromtheSherwinWilliams® website,selectAerospaceFinishes)forassistanceprocuring the correct paint.

2 Application


a PreparethedesiredpaintmixtureinaccordancewiththemixtureproportionsspecifiedinTable3-2ConsumablesandApplicability.

b UsingcheeseclothCM159orequivalentdampenedwithsolventacetoneCM173,MEKCM106,orMPKCM219,wipeallsurfaces of the part to be painted.


173


c Permit the solvent acetone CM173, MEK CM106, or MPK CM219 to dry.

d Painttheentiresurfacewiththespecifiedpaintmixusingasmooth, even spraying motion in three passes until the entire surface to be painted is covered.

NOTE: Three (3) passes of paint over the surface is considered to be one layer of paint.

(1) Themaximumpermittedfilmthicknessofthepaint(color)is2milswhendry.

(a) Theequivalentof5milswetcoat=2milsdrycoat.

(b) WetcoatthicknesscanbemeasuredusingaSherwinWilliams®wetfilm/milgaugestandard.

e Permitthepaintedsurfacetodryinaccordancewiththepaintmanufacturer's instructions until it is dry to the touch.

(1) For adequate layer-to-layer paint adhesion, the maximum timepermittedbetweenlayersofpaintisfour(4)hours.

(2) If it has been longer than four hours since the previous layerofpaintwasapplied:

CAUTION: DO NOT SAND THE FINAL LAYER OF PAINT BEFORE APPLYING THE CLEAR COAT. IF IT HAS BEEN LONGER THAN FOUR HOURS SINCE THE FINAL LAYER WAS APPLIED, REMOVE THE PAINT IN ACCORDANCE WITH THE SECTION, "PAINT REMOVAL" IN THIS CHAPTER.

(a) Using 400 grit sandpaper, lightly sand the cured surface.

(b) Using clean, dry cheesecloth CM159 or equivalent, wipethesandedcuredsurfacebeforeapplyingasubsequent layer of paint.

(c) Re-paintinaccordancewiththesection,"AcryGlo® Series 571 Paint" in this chapter.

CAUTION: ACRY GLO® SERIES 571 METALLIC (H CODE) PAINTS REQUIRE THE USE OF A CLEAR COAT.

f For Acry Glo® Series 571 metallic (H code) paint, a clear coat must be applied.


173


CAUTION: DO NOT EXCEED 24 HOURS BETWEEN THE LAST LAYER OF PAINT AND THE LAYER OF CM292 CONVENTIONAL CLEAR.

(1) Using the same application procedure as used for the color, apply CM292 Conventional Clear over the metallic paint.

(2) Themaximumallowablefilmthicknessoftheclearcoatis2milswhendry.

(a) Theequivalentof5milswetcoat=2milsdrycoat.

(b) WetcoatthicknesscanbemeasuredusingaSherwinWilliams®wetfilm/milgaugestandard.

(2) Instruction 2

(a) Use of alternate top coat paint

1 Hartzell Propeller Inc. has practical experience onlywithPolane® T paints as the top coat on some spinners.

a Based on this experience, Hartzell Propeller Inc. only recommends using Polane® T paints on these spinners.

2 HartzellPropellerInc.acceptsnoresponsibilityforwear,peeling,orother problems related to the application of any alternate paints.

(b) Polane® T Paint

1 General

a Recommended Film Thickness

(1) Two(2)layersofPolane® T paint measuring a total of 2to4milswhendry

(a) On the smooth side of the bulkhead: The maximum total thickness of primer sealer, paint, andclearcoat(ifapplicable)is7milswhendry.

(b) On the rough side of the bulkhead: OnlytwolayersofPolane® T paint is required.


c AspinnerpartcanbepaintedwithanyapprovedPolane® T paint mixture.

(1) For approved Polane® T paint mixtures, refer to the Paint and Finish chapter of Hartzell Propeller Inc. Standard Practices Manual 202A (61-01-02).


173


d Ifascrewandwashercombinationwasusedtomaskthemountingscrewholesonthesmoothsideofthebulkhead,removethehardwarebeforeapplyingPolane® T paint to the rough side of the bulkhead.

2 Application

a Preparethedesiredpaintmixtureinaccordancewiththemixture proportions.

(1) For mixture proportions, refer to the Paint and Finish chapter of Hartzell Propeller Inc. Standard Practices Manual 202A (61-01-02).

b On the smooth side of the bulkhead: UsingcheeseclothCM159orequivalentdampenedwith MEKCM106,wipetheentiresurface,includingtheID.

c On the rough side of the bulkhead: UsingcheeseclothCM159orequivalentdampenedwith MEKCM106,wipethebulkheadmountingsurface.

NOTE: The bulkhead mounting surface is the raised surface adjacent to the ID on the rough side of the bulkhead.

d Permit the MEK CM106 to dry.

e On the smooth side of the bulkhead: Painttheentiresurfacewiththespecifiedpaintmixusingasmooth, even spraying motion in three passes.


f Permitthepaintedsurfacetodryinaccordancewiththepaintmanufacturer's instructions until it is dry to the touch.

(1) Forsufficientlayer-to-layerpaintadhesion,themaximumtimebetweencoatsofpaintisfour(4)hours.

(2) If it has been longer than four (4) hours since the previous layerofpaintwasapplied:


(b) Usingclean,drycheeseclothCM159orequivalent,wipethe sanded cured surface before applying a subsequent layer of paint.

g On the smooth side of the bulkhead: Repeat the paint application using three (3) passes to apply a second layer of paint, making sure that the surface of the part is fully covered.


173


h Removethemaskingmaterialfromthemountingscrewholesinthe bulkhead.

(1) On the rough side of the bulkhead: Leave the masking material in position that covers the part number and serial number.

i If the bulkhead mounting surface on the rough side of the bulkhead has neverbeenpainted,applytwolayersofpaintinaccordancewithsteps2.I.(2)(b)2 k through 2.H.(2)(b)2 k (4).

j If the bulkhead mounting surface on the rough side of the bulkhead has been painted before, apply one layer of paint in accordancewithsteps2.I.(2)(b)2 k through 2.H.(2)(b)2 k (1).

k On the rough side of the bulkhead: Paintthebulkheadmountingsurfacewiththespecifiedpaintmixusing a smooth, even spraying motion in three passes.


(1) Permitthepaintedsurfacetodryinaccordancewiththepaint manufacturer's instructions until it is dry to the touch.

(2) Forsufficientlayer-to-layerpaintadhesion,themaximumtimebetweencoatsofpaintisfour(4)hours.

(3) If it has been longer than four (4) hours since the last layer ofpaintwasapplied:


(b) Usingclean,drycheeseclothCM159orequivalent,wipethe sanded cured surface before applying the second layer of paint.

(4) Repeat the paint application using three (3) passes to apply a second layer of paint, making sure that the surface of the part is fully covered.

l Ifthepartwillbeputinanairtightplasticbag,curethepartforaminimum of 24 hours.


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J. Paint Inspection


(1) Inspection of Polane® T Paint

(a) Examine the surface for satisfactory paint coverage.

1 If the paint coverage is not satisfactory:

a Sand the Polane® T paint layer from the entire part.

CAUTION: APPLY POLANE® T PAINT ONLY TO THE DEGREE REQUIRED TO UNIFORMLY COVER THE PART. AVOID EXCESSIVE PAINT BUILDUP TO AVOID CHANGING THE PROFILE OF THE PART AND/OR THE CONDUCTIVE COATING CHARACTERISTICS.

b Repaintthepartinaccordancewiththesection, Polane® T Paint in this chapter.

c Optionally,followtheinstructionsinthesection"RefinishingafterRepair" in this chapter.

(2) Inspection of Acry Glo® Series 571 Paint

(a) Examine the surface for satisfactory paint coverage.

1 If the paint coverage is not satisfactory:

a Sand the Acry Glo® Series 571 paint layer from the entire part.

CAUTION: APPLY ACRY GLO® SERIES 571 PAINT ONLY TO THE DEGREE REQUIRED TO UNIFORMLY COVER THE PART. AVOID EXCESSIVE PAINT BUILDUP TO AVOID CHANGING THE PROFILE OF THE PART AND/OR THE CONDUCTIVE COATING CHARACTERISTICS.

b Repaintthepartinaccordancewiththesection"AcryGlo® Series 571 Paint" in this chapter.

c Optionally,followtheinstructionsinthesection"RefinishingafterRepair" in this chapter.

(3) Remove any masking material, if used.


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K. Erosion Mask Installation


(1) Inspectformissingpaint,pinholes,pitting,andporosityasfollows:

(a) Visuallyexaminethedomeerosionshieldforwardofthedomeerosionshield parting line.

(b) Visually examine the spinner dome aft of the dome erosion shield parting line.

(c) Repairanydefectinaccordancewiththesection"DomeErosionShieldRepair" in the Minor Repair chapter of this manual.

(2) Inspect the spinner dome aft of the dome erosion shield parting line.

(3) Inspect the spinner dome aft of the dome erosion shield parting line.

(4) If the dome erosion shield and spinner dome do not require repairs, continue withthestepsinthefollowingInstallationProcedure.

(5) Cleaning


(a) UsingcheeseclothCM159orequivalentdampenedwithsolvent acetoneCM173,MEKCM106,orMPKCM219,wipethesurfacecleanwheretheUHMWtapeCM137willbeinstalledontheforwardbulkheadofthe dome.


173


(6) Installation Procedure

CAUTION 1: DO NOT TRIM THE EROSION MASK ON THE SPINNER DOME BECAUSE DAMAGE TO THE SPINNER DOME WILL OCCUR.

CAUTION 2: DO NOT INSTALL THE EROSION MASK ON THE DOME EROSION SHIELD UNTIL THE PAINT HAS CURED FOR A MINIMUM OF EIGHT (8) HOURS OR THE EROSION MASK WILL NOT ADHERE PROPERLY.

(a) Refer to Table 3-1 Finish Procedures in this chapter, for approval for installation of the erosion mask.

(b) Part Numbers

1 792200091 supplied by Hartzell Propeller Inc.

2 SJ8665FP202 supplied by 3M Company, 3M Bldg. 220-8E, St. Paul, MN 55144, Tele: 1.800.362.3550, Fax: 612.733.9175

3 PM-91 supplied by PM Research, 4110 Niles Hill Rd., Wellsville, NY 14895, Tele: 716.593.3169, Fax: 716.593.5637

(c) Exceptfortrimmingtheerosionmaskwheninstalledonthespinner, followthemanufacturer'sinstructionsformakingatemplateandtrimmingthe customer procured erosion mask.

1 Using a measurement of 5.0 inches (127.0 mm) along the surface oftheerosionmask,fromthetopcenterlinedownthesideoftheerosion mask produces a mask of satisfactory size.

(d) Installtheerosionmasktothedomeerosionshieldinaccordancewithmanufacturer's installation instructions.

1 The erosion mask must be smooth over the dome erosion shield and thespinnerdomewithnoairpockets.


173


Resistance Check of the Dome Figure 3-1

Dome Unit

Screw (spinner dome mounting)

Washer (spinner dome mounting)

B-3839-3 Nut (or any nut of an appropriate size)

A-1040 Washer (or any non-conductive washerofanappropriatesize, that prevents contact betweenthenutandthe

inside surface of the dome)

For the Permitted

Resistance, Refer to the Table

in this Figure

Dome Unit

TI-0

0114

Spinner Assembly Part Number

Dome Part Number

Maximum Permitted Resistance

E-5579-( ) E-5580-( ) 2 ohmsD-7409-( ) D-7408-( ) 2 ohmsE-7480 E-7481-( ) 2 ohms101298 101299 2 ohms102870 102885 0.1 Megohm103409( ) 103410( ) 0.1 Megohm103585( ) 103582( ) 0.1 Megohm103629( ) 103627( ) 0.1 Megohm104529 104573 0.1 Megohm104888-( ) 104886( ) 0.1 Megohm105085( ) 105122( ) 0.1 Megohm105127( ) 105129( ) 0.1 Megohm105656( ) 105651( ) 0.1 Megohm105945( ) 105943( ) 0.1 Megohm106040( ) 106039( ) 0.1 Megohm106188( ) 106184( ) 0.1 Megohm106215( ) 106214( ) 0.1 Megohm106311( ) 106322( ) 0.1 Megohm106574( ) 103582( ) 0.1 Megohm106848( ) 106847( ) 0.1 Megohm106871( ) 106911( ) 2 ohms106957( ) 106956( ) 0.1 Megohm


173


L. Resistance Check of the Dome


NOTE 2: The dome is not installed on the bulkhead or the adapter ring unit.

(1) Installascrewwithwashersandanutineachoftwodomemountingholeswiththemaximumdistancepossiblebetweenthem,inaccordancewiththeinformation in Figure 3-1.

(2) Usinganohmmetercapableofmeasuringtheresistancespecifiedin Figure3-1,performthefollowingresistancechecks:

(a) Measuretheresistancefromthescrewinonedomemountingholetothescrewintheotherdomemountinghole.RefertoFigure3-1.

1 If the resistance measurement is not satisfactory, clean the contact points using a solvent such as CM23 or equivalent and repeat the resistance measurement.

2 If the resistance measurement is not satisfactory after cleaning for thetwoholes,usetwodifferentholeswiththemaximumdistancepossiblebetweenthemandrepeatthemeasurement.

a Repeatthemeasurementusingdifferentholeswiththemaximumdistancepossiblebetweenthemuntiltheresistancemeasurement is satisfactory.

(3) Removethehardwarethatwasusedfortheresistancecheckofthedomefromthe dome mounting holes.


173


Resistance Check of the Bulkhead Figure 3-2

A A

Section A-A

Bolt/Screw(steel) of appropriate size

Flat Washer (steel) of appropriate size Nut (steel)

of appropriate size

Bulkhead Mounting Hole

Nutplate

Flat Washer (steel) of appropriate sizeBulkhead

TPI-M

B-0

100


173


Resistance Check of the Bulkhead Figure 3-3

A A

Bulkhead Mounting Hole

Nutplate

Dimpled Washer NAS1169-( ) of appropriate size

Section A-A

Bolt/Screw(steel) of appropriate size

Nut (steel) of appropriate size Flat Washer (steel)

of appropriate size

TPI-M

B-0

100a


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M. Resistance Check of the Bulkhead


NOTE 2: The dome is not installed on the bulkhead.

(1) Inonebulkheadmountinghole,installthehardwarefortheresistancecheckinaccordancewiththeapplicableFigurereferencedinTable3-4.

(2) Installonespinnerdomemountingscrewinthenutplatethatisthemaximumpossibledistancefromthehardwareinstalledinthebulkheadmountinghole.Refer to the applicable Figure referenced in Table 3-4.

(3) Usinganohmmetercapableofmeasuringtheresistancespecifiedin Table3-4,performthefollowingresistancechecks.

(a) Measuretheresistancefromthehardwareinstalledinthebulkheadmountingholetothespinnerdomemountingscrewinstalledinthenutplate. Refer to Table 3-4 for the maximum permitted resistance.


Bulkhead/Adapter Ring Part Number

Maximum Permitted Resistance Refer to:

E-5579-( ) E-5581 2 ohms Figure 3-2D-7409-( ) D-7404 2 ohms Figure 3-2E-7480 D-6666 2 ohms Figure 3-3102870( ) 102892 2 ohms Figure 3-2104529 104572 2 ohms Figure 3-3105085( ) 105123( ) 2 ohms Figure 3-3105127( ) 106015( ) 2 ohms Figure 3-2106311( ) 106323( ) 2 ohms Figure 3-3106188( ) 106185( ) 2 ohms Figure 3-3106957( ) 106955( ) 2 ohms Figure 3-3

Resistance Check of the Bulkhead Table 3-4


173




2 If the resistance measurement is not satisfactory after cleaning for thetwoholes,usetwodifferentlocationswiththemaximumdistancepossiblebetweenthemandrepeatthemeasurement.

a Repeatthemeasurementusingdifferentlocationswiththemaximumdistancepossiblebetweenthemuntiltheresistancemeasurement is satisfactory.

(4) Removetheresistancecheckhardwarefromthebulkhead.


173


Resistance Check of the Fairing Unit Figure 3-4

B-3837-0363 Washer (oranywasherofan

appropriate size)

B-3839-3 Nut(or any nut of an appropriate size)

Washer (fairing mounting)

Screw (fairing unit mounting)

For illustration purposes, thescrewisshownengaged,

but not tightened


Fairing Unit Part Number

Maximum Permitted Resistance

104529 104571 0.1 megohm

106957( ) 104571 0.1 megohm

TI-4

11-0

1 TI

-001

15B

TI

-001

15C

For the Permitted

Resistance, Refer to the Table

in this Figure


173


N. Resistance Check of the Fairing Unit

NOTE 1: Forthefinishproceduresapplicabletoeachfairingunit,refertoTable3-1Finish Procedures in this chapter.

NOTE 2: The fairing unit is not installed on the bulkhead.

(1) Inonefairingunitmountinghole,installascrewwithwashersandanutinaccordancewiththeinformationinFigure3-4.

(2) Usinganohmmetercapableofmeasuringtheresistancespecifiedin Figure 3-4,performthefollowingresistancechecks.

(a) Measuretheresistancefromthescrewinstalledtoafairingunitscrewthatisthemaximumdistancepossibleawayfromtheinstalledscrew.RefertoFigure 3-4.


2 If the resistance measurement is not satisfactory after cleaning for thetwoholes,usetwodifferentlocationswiththemaximumdistancepossiblebetweenthemandrepeatthemeasurement.

a Repeatthemeasurementusingdifferentlocationswiththemaximumdistancepossiblebetweenthemuntiltheresistancemeasurement is satisfactory.

(3) Removethehardwarethatwasusedfortheresistancecheckofthefairingunitfrom the fairing unit mounting holes.


173


1 TOOLING 61-10-73 Sep/14


173

TOOLING AND MATERIALS - CONTENTS

1. Tooling ..................................................................................................................... 4-3

A. "Coin" ................................................................................................................. 4-3B. Special Tooling ................................................................................................... 4-3

LIST OF FIGURES

Example of a "Coin" .............................................................................. Figure 4-1 ............. 4-3



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173

1. Tooling

NOTE: SpecificHartzellPropellerInc.manualsandservicedocumentsareavailableontheHartzellwebsiteatwww.hartzellprop.com.RefertotheRequiredPublicationssectionintheIntroductionchapterofthismanualfortheidentificationofthesepublications.

A. "Coin"

(1) Atool,or"coin",isneededforthecoin-tapinspection.

(a) Thecoinshouldbeawasher-shapedmetaltapper,approximately 2.5 inches (64 mm) OD x 1.25 inches (32 mm) ID x 0.25 inch (6.4 mm) thick,andweighingnolessthan3oz.(85.05g).RefertoFigure 4-1.

B. Special Tooling

(1) Specialtoolingmayberequiredforproceduresinthismanual.Thereferencenumberforaspecialtoolwillappearwiththeprefix"TE"directlyfollowingthetoolnametowhichitapplies.Forexample,arollerthatisreferencenumber330willappearas:rollerTE330.

(a) Forfurthertoolinginformation,refertoHartzellPropellerInc.IllustratedToolandEquipmentManual165A.

Example of a "Coin" Figure 4-1

TI-c

oin



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