AVIATION UNIT MAINTENANCE INCLUDING … 55-4920-403-20&p technical manual aviation unit maintenance...

TM 55-4920-403-20&P

TECHNICAL MANUAL

AVIATION UNIT MAINTENANCEINCLUDING REPAIR PARTS

FORTOOL SET COMPANY SIZE,

SET NO. 2 AIRMOBILE(NSN 4920-00-567-0476)

(LIN W60206)

HEADQUARTERS, DEPARTMENT OF THE ARMY

11 APRIL 1978

WARNING

PRECAUTIONARY DATA

Personnel performing operations, procedures and practices which are included or implied in the Tech-nical Manual shall observe the following warnings. Disregard of these warnings and precautionary infor-mation can cause serious injury, death or destruction of material.

WARNING

A minimum of two persons are needed when moving or lifting the environmental control units (eachweighing 290 pounds). Make sure that both circuit breakers (60A and 30A) on the circuit breaker panelare in the off position before installing the environmental control units to the interior of shelter, The shel-ter contains voltages that are dangerous if contacted. Before removing either electric cables or com-ponents, make certain electrical power is completely disconnected. Install and connect grounding rodsbefore energizing shelter.

CLEANING SOLVENTS

Cleaning solvents may be toxic. Use in well ventilated areas. Avoid prolonged inhalation of fumes or di-rect contact with skin, Do not use solvents near open flame or in areas where very high temperaturesprevail, Shelter must have adequate ventilation when cleaning solvents are being used.

COMPRESSED AIR

Do not direct compressed air near or directly against skin. Do not use air under high pressure or from asource not having a moisture trap when drying parts. Do not roll bearings with compressed air,

WARNING

An operating procedure, practice, etc., which, if not correctly followed, could result in personnel injury orloss of life.

CAUTION

An operating procedure, practice, etc., which, if not strictly observed, could result in damage to or de-struction of equipment.

NOTE

An operating procedure, condition, etc., which is essential to highlight.

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C 3

HEADQUARTERSDEPARTMENT OF THE ARMY

WASHINGTON, D. C., 15 0ctober 1993

Aviation Unit Maintenance Including Repair Partsfor

TOOL SET COMPANY SIZE,


(LIN W60206)

DISTRIBUTION STATEMENT A: Approved for public release; distribution is unlimited

TM 55-4920-403-20&P, 11 April 1978, is changed as follows:

1. Remove and insert pages as indicated below. New or changed text material is indicated by avertical bar in the margin. An illustration change is indicated by a miniature pointing hand.

Remove pages Insert pages

i and ii i and ii1–1 through 1-3/( 1-4 blank ) 1–1 through 1–3/(1-4 blank )3–1 and 3–2 3–1 and 3-2

2. Retain this sheet in front of manual for reference purposes.

By Order of the Secretary of the Army:

GORDON R. SULLIVANGenera/, United States Army

Chief of StaffOfficial:

MILTON H. HAMILTONAdministrative Assistant to the

Secretary of the Army05574

DISTRIBUTION:To be distributed in accordance with DA Form 12–31 -E, block no. 334, requirements forTM 55-4920-403-20&P.

CHANGE

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TM 55-4920-403-20&PC 2


WASHINGTON, D.C.,30 January 1987

AVIATION UNIT MAINTENANCE INCLUDING REPAIR PARTSFOR TOOL SET COMPANY SIZE,


(LIN W60206)

TM 55-4920-403-20&P, 11 Apr i l 1978, is changed as fo l lows:

1. Remove and insert pages as indicated below. New or changed text mater ia li s i nd ica ted by a ve r t i ca l ba r in the marg in . A n i l l u s t r a t i o n c h a n g e i s i n d i c a t e dby a m in ia tu re po in t ing hand .

Remove pages Inser t pages

i a n d i i i a n d i iChapter 1 1-1 and 1-2 1-1 and 1-2Chapter 2 2-1 and 2-1 2-1 and 2-2Chapter 3 3-1 and 3-2 3-1 and 3-2Appendix A A-1 /A-2 A-1 /A-2Appendix B B-1 and B-2 B-1 and B-2

C-3 through C-6 C-3 through 3-6

2. Reta in th i s shee t in f ron t o f manua l fo r re fe rence purposes .


Official:

R.L. DILWORTHBrigadier General, United States Army

The Adjutant General

JOHN A. WICKHAM, JR.GeneraI, United States Army

Chief of Staff

DISTRIBUTION:To be distr ibuted in accordance with DA Form 12-31, AVUM requirements for a l l

F ixed and Rotary Wing Aircraf t .

CHANGE

No. 1

TM 55-4920-403-20&PC 1


WASHINGTON, D.C., 2 January 1979

AVIATION UNIT MAINTENANCE INCLUDING REPAIR PARTSFOR TOOL SET COMPANY SIZE,


(LIN W60206)

TM 55-4920-403-20&P, 11 Apr i l 1978, is changed as fo l lows:

1. Remove and insert pages as indicated below.

Remove pages Inser t pages

Chapter 1 1 -1 th ru 1 -3 /1 -4 1-1 th ru 1 -3 /1 -4Chapter 2 2-1 and 2-2 2-1 and 2-2Chapter 3 3 -1 th ru 3 -4 3-1 th ru 3 -4Appendix D D-69/D-70 D-69/D-70

D-71/D-72 D-71/D-72

2. New or changed tex t mate r ia l i s i nd ica ted by a ve r t i ca l ba r in themargin. An i l l us t ra t ion change i s ind ica ted by a m in ia tu re po in t ing hand .

3. R e t a i n t h i s

By Order of the Secretary

Official:

s h e e t i n f r o n t

of the Army:

J. C. PENNINGTON

of manual for reference purposes.

BERNARD W. ROGERSGeneral, United States Army

Chief of Staff

Brigadier General, United States ArmyThe Adjutant General

DISTRIBUTION:To be distr ibuted in accordance with DA Form 12-31, Organizat ional Maintenance

Requ i rements fo r a l l F ixed and Roto r Wing A i rc ra f t .

TM 55-4920-403-20&P

TECHNICAL MANUAL HeadquartersDepartment of the Army

No. 55-4920-403-20&P Washington, DC, 11 April 1978

Aviation Unit Maintenance Including Repair PartsTool Set Company Size,Set No. 2 Airmobile

(NSN 4920-00-567-0476(LIN W60206)

REPORTING ERRORS AND RECOMMENDING IMPROVEMENTS

You can help improve this manual. If you find any mistake or if youknow of a way to improve the procedure, please let us know. Mail yourletter, DA Form 2028 (Recommended Changes to Publications andBlank Forms) or DA Form 2028-2 (Test) located in the back of thismanual, directly to Commander, US Army Aviation and Troop Command,ATTN: AMSAT-I-MP, 4300 Goodfellow Blvd., St. Louis, Missouri 63120-1798.A reply will be furnished to you.

DISTRIBUTION STATEMENT A: Approved for public release; distribution is unlimited

CHAPTER 1Section I

Section II

CHAPTER 2

CHAPTER 3Section I

Section II

INTRODUCTIONGeneralScope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Maintenance Forms and Records ... . . . . . . . . . . . . . . . . . . . . . . . . . . . .Administrative Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Quality Assurance/Quality Control.. . . . . . . . . . . . . . . . . . . . . . . . . . . . .Destruction of Material to Prevent Enemy Use, . . . . . . . . . . . . . . . . . . . .Reporting of Equipment Improvement Recommendations . . . . . . . . . . .Description and Tabulated DataDescription . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Shelter Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Shelter Components and Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Tabulated Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Electrical Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Spares, Repair Parts, Special Tools and Other Special SupportEquipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

OPERATOR/CREW MAINTENANCE INSTRUCTIONSService Upon Receipt of Material from Storage or lnitial lssue . . . . . . .Preparing Shelter for Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .instructions for Moving Shelter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

AVIATION UNIT MAINTENANCE INSTRUCTIONSGeneralDescriptive Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Maintenance InstructionsShelter Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Fixture Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Electrical Components Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . .Major TOE Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Paragraph

1-11-21-31-41-51-51-7

1-81-91-101-111-12

1-13

2-12-22-32-4

3-1

3-23-33-43-5

Page

1-11-11-11-11-11-11-1

1-11-11-21-21-2

1-3

2-12-12-22-2

3-1

3-13-13-23-4

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APPENDIX AAPPENDIX BAPPENDIX CAPPENDIX D

Paragraph Page

REFERENCES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1MAINTENANCE ALLOCATION CHART . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1REPAIR PARTS AND SPECIAL TOOLS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-1SHELTER DRAWINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-1

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TM 55-4920-403-20&P

C H A P T E R 1

I N T R O D U C T I O N

Section I.

1-1. Scope. This manual is for your use in operatingand maintaining the aviation unit maintenance shop setand equipment mounted in the portable shelter. It pro-vides the necessary information about the shelter,storage for the tools, equipment and working space forpersonnel performing aviation unit maintenance of air-craft material.

1-2. Maintenance Forms and Records. Mainte-nance forms and records which you are required to useare listed and explained in DA PAM 738-751.

1-3. Administrative Storage. Refer to TM 740-90-1for storage requirements.

1-4. Calibration. There are several items in theAVUM No. 2 shop set which require periodic calibra-tion, for example, torque wrenches, dial indicators, etc.This equipment should be calibrated in accordancewith procedures and practices contained in TB 43-180.

GENERAL

1-5. Quality Assurance/Quality Control (QA/QC).There are no quality assurance/quality controlmanuals pertaining to this material.

1-6. Destruction of Material to Prevent Enemy Use.Refer to TM 750-244-3 for procedures concerningdestruction of this material.

1-7. Reporting of Equipment Improvement Rec-ommendations (EIR). If your tool set company size,set No. 2 airmobile needs improvement, let us know.Send us an EIR. You, the user, are the only one whocan tell us what you don’t like about your equipment.Let us know why you don’t like the design or per-formance. Put it on an SF 368 (Product QualityDeficiency Report). Mail it to the address specifiedin DA PAM 738-751.

Section Il. DESCRIPTION AND TABULATED DATA

1-8. Description.

a. Refer to TB 43-0124 for the basic description ofthe portable S-280 shelter.

b. Each S-280 shelter is modified per drawing4920-EG-056 (figure D-2) to a shelter suitable for avia-tion unit maintenance.

c. Each 4920-EG-056 shelter (figure D-2) is furthermodified per drawing 4920-EG-054 (figure D-1) to acommon AVUM No. 2 shelter.

d. The 4920-EG-054 AVUM No. 2 shelters (figureD-1) are then finished per drawing 4920-EG-057 (figureD-3) into three specific configurations which make upthe AVUM No. 2 complex.

1-9. Shelter Features.

a. A hook to assist in balancing tail rotors isinstalled in the No. 1 shelter of each complex.

WARNING

Loads exceeding 75 pounds should notbe applied to ceiling hook.

b. Mobilizer brackets are installed on all sheltersper drawing 4920-EG-080 (figure D-6) to allow groundhandling with the M-720 dolly set. Details onthe use of the M-720 dolly set can be found inTM 9-2330-285-14.

c.trical

Assistance in troubleshooting the elec-system is available by referring to drawings

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4920-EG-056 (figure D-2) for shelter wiring, 4920-EG-058 (figure D-4) for cable wiring and 4920-EG-077 (figure D-5) for power distribution panelwiring.

d. Power cables may be field repaired usinga standard blade screwdriver to replace con-nector. (Refer to drawing 4920-EG-058 (figure D-4).)

e. Repairs to the shelter itself should followthe guidance given in the shelter TB 43-0124.

f. Compressed air service panel is providedto route air from an outside air compressor intoeach shelter.

g. Duplex type weatherproof electrical outletlocated on the power inlet panel is provided topower trouble lights and hand tools used outsideeach shelter.

1-10. Shelter Components and Location. Forshelter components and location, refer to draw-ings 4920-EG-054 (figure D-1) and 4920-EG-057(figure D-3).

a. Angle iron frames and brackets, as illus-trated in figures D-1 and D-2, are secured to theshelter floor and walls.

b. The work table (item 5, figure D-1) is se-cured to the right wall and floor by brackets.

c. Wall mounted shelf/table (item 3, figure D-1 ) is secured to the left wall of shelter.

d. The environmental control unit (ECU) issecured to its support item 11, figure D-2)through the opening in the back-wall of the shel-ter for operation and secured to bracket assembly(item 6, figure D-2) for storage and shipment.

e. The vise (item 11, figure D-3) and grindingmachine (item 12, figure D-3) are mounted on thework table located on the right side of the appro-priate shelter as shown in drawing 4920-EG-057(figure D-3).

f. Storage space is provided in the drawersof the work table for storing other components ofthe shop set. These components will normally bereceived on initial shipment in boxes strapped tothe shelter floor. It will be the responsibility of theaviation unit repairman to unpack, check items forquantity and serviceability, and-stow them indrawers of the appropriate work table (item 5, fig-ure D-1).

g. Components of the AVUM No. 2 tool set arelisted and illustrated in Supply Catalog SC 4920-99-CL-A92.1-11. Tabulated Data.

a. Type of construction: stressed skin alumi-num foam-core with laminated bond between skinand foam-core.

b. Dimensions of the shelters are as follows:

Maximum outside dimensions (inches)

Shelter Type No. Length Width Height

S-280/G 147 87 83-3/8

c.Phase

d.ECU).

e.

using

Power requirement: 208 volt 60 Hz 34 wire.

Weight: 2200 pounds per shelter (less

Transportability:

(1) Ground handling is accomplished bydolly set M-720 with brackets installed on

each shelter by fork lift or crane.

When transporting a shelter by air,avoid dropping the shelter or suddenjerks on the lifting rings, since seriousstructural damage wiII result.

1-2 Change 2

(2) Shelters are airmobile by helicoptersling loading and by regular air cargo shipment.(Refer to TB 43-0124.)

1-12. Electrical Power.

a. Electrical power is transmitted from a 60Hz mobile electric generator through the powerdistribution panel to the shelters by a heavy-dutypower cable.

Be sure generator is set for 208V 3phase operation.

TM 55-4920-403-20&P

b. The power distribution panel (item 1, figure D-5) No. 6 AWG wire of suitable length. Always keepis provided to isolate shelters electrically from each ground cables as short as possible. For addi-other, to provide a means of safely connecting and tional information, refer to TC 11-6 GROUNDINGdisconnecting individual shelters without disturbing TECHNIQUES.others in the complex, and to progressively load thegenerator.

1-13. Spares, Repair Parts, Special Tools andOther Special Support Equipment.

c. Supplied ground rod and grounding cableare intended for field use. If shelter is operated on

a. There are no special tools or equipment required

a hard stand, drive ground rod as close to shelter for maintenance of the S-280 shelter.

as possible or use other suitable existing nearby b. Repair parts are listed in Appendix C for theground. DO NOT SPLICE GROUND CABLE. If shelter modification. Repair parts for the basic S-280supplied ground cable is too short, use at least shelter are listed in TM 11-5410-213-14P.

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C H A P T E R 2

O P E R A T O R / C R E W M A I N T E N A N C E I N S T R U C T I O N S

2-1. Service Upon Receipt of Material from Stor-age or lnitial Issue.

a. Shelters will normally be received in thefollowing condition:

(1) Storage frames for the environmentalcontrol unit will be installed.

(2) Work table, shelf/table and fire extin-guisher are already attached to the floor and wallof the shelter.

(3) Power cable (item 2, figure D-4) isstored under the work table.

(4) The grinding machine and vise willbe installed as illustrated in figure D-3.

(5) Components of tool sets will nor-mally be boxed and strapped to the shelter floor.

(6) Environmental control units, whichare TOE items, will normally be shipped sepa-rately from the shelter.

b. Cleaning and stowage will be performedas follows.

NOTE

Inspect all material after cleaning fordeterioration or damage.

(1) Remove web straps securing boxedcomponents of the shop set.

(2) Unpack components of shop set fromboxes. Remove preservative material from toolsand store tools in the drawers of work table. Re-pair or replace damaged or missing material.

(3) Remove packing and preservativematerials from vise and grinding machine.

(4) If shelters are to be transported toanother location before being put into operation,perform the following operations:

(a) Place the environmental controlunits in storage frames and secure with webstraps (figure D-7).

WARNING

A minimum of two persons are neededwhen moving or lifting the environ-mental control unit.

(b) Secure power cabletable.

2-2. Preparing Shelter for Operation.

under work

a. Using the handles, raise one end of theenvironmental control unit and slide it out of theframe.

b. ECU shipping bracket may be removedfrom floor and stowed in a convenient place.

Make sure that both 3 phase circuitbreakers (60A and 20A) on the circuitbreaker panel are In the off position be-fore proceeding with the next step.

c. Open ECU mounting port and install ECUon the shelter mounting shelf. Connect ECUpower cable (item 44, figure D-2).

d. Open shelter vent on door.

e. Drive ground stake and connect to groundpost on shelter in accordance with TC 11-6.

f. Set power distribution panel next to gen-erator set and attach pigtail to generator.

Make sure generator Is set for 208V 3phase operation and pigtall leads areconnected in accordance with drawing4920-EG-077 (figure D-5).

g. Lay power cables from each shelter to thepower distribution panel.

h. Make sure all circuit breakers in the shel-ter are off, then connect power cable to shelter.

i. Connect power cable to power distributionpanel.

j. Connect the cable assembly from powerdistribution panel to generator pigtail cableassembly.

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WARNING

The shelter contains voltages that aredangerous if contacted. Before re-moving either electric cables or com-ponents, make certain electrical poweris completely disconnected. Do notconnect or disconnect power cableswhile energized. Install and connectgrounding rods before energizing shel-ter.

k. Start generator and energize shops in thefollowing sequence:

(1 ) C lose ( tu rn on) genera to r ma inbreaker.

(2) Close (turn on) power panel breaker.

(3) Close (turn on) shelter main breaker.

2-3. Instructions for Moving Shelter.a . Make sure genera to r power i s o f f ,

open main breaker, then disconnect powerc a b l e f r o m g e n e r a t o r p i g t a i l a n d s t o r eon power panel storage plate.

b. Disconnect power cable from shelter.

c. If necessary, retrieve from storage theECU mounting frame and install frame on shelterfloor with four hexagon-head capscrews and lock-washers.

d. Remove environmental control unit fromshelter mounting shelf and place in ECU frame onshelter floor, then secure the environmental con-trol unit with web straps. (Refer to figure D-7.)

e. Close ECU mounting shelf.

f. Remove ground rod and save for reuse.

g. Close shelter vent.

h. Secure the power cable (item 2, figure D-4) under work table,

i. Place all tools and components of theshop sets in drawers of the work table.

i. All loose items to be transported in sheltermust be secured and strapped down.

k. Close shelter for movement in accordancewith the instructions contained in TB 43-0124.

2-4. Operation.

a. Refer to appropriate technical manualsand manufacturer’s literature for operation ofgrinding machine.

b. Remove tools from storage drawers inwork table as required for performing aviation unitmaintenance of aircraft -material. Return tools toproper storage location when not in use.

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C H A P T E R 3

A V I A T I O N U N I T M A I N T E N A N C E I N S T R U C T I O N S

Sect ion I . GENERAL

3-1. Descriptive Information. e. Information on care, repair and parts for

a. Refer to TB 43-0124 for aviation unit mainte-the environmental control unit can be ‘found in

nance to be performed on the shelter.TM 5-4120-239-14.

b. Maintenance of grinding machine can bef. Power cables may be field repaired using a

found in the appropriate technical manuals and standard blade screwdriver to replace connector. Refer

manufacturer’s literature.to drawing 4920-EG-058 (figure D-4).

c. Replace unserviceable components of shop set.g. Have an aircraft electrician or other qualified

person work on electrical parts of the shelter.d. Refer to the maintenance allocation chart

(Appendix B) for aviation unit maintenance to beperformed on the shop set.

Section I l . MAINTENANCE INSTRUCTIONS

3-2. Shelter Maintenance. Inspect shelter care-fully for defects. Refer to TB 43-0124 and TM 11-5410-213-14P for repair procedures and replace-ment parts.

3-3. Fixture Maintenance.

a. Work Table. The worktable is part of the tool setand replacements may be ordered from the SupplyCatalog. Remove and save the mounting bolts, lagscrews and brackets (items 10, 17 and 25, figure D-1)from the original work table. Place the new worktableon the floor mounting plates (item 26, figure D-1) andinstall bolts. Bolt angle brackets (item 10, figure D-1) towall; then, using the bottom hole as a guide, drill thetable top and install lag screws.

b. ECU Shipping Bracket. If the ECU shippingbracket or its straps are found to be unserviceable,remove the four bolts and Iockwashers securing it tothe floor, replace with a new bracket and reinstall thebolts and Iockwashers.

c. ECU Shelf Assembly.

(1) The ECU support cable assembly (item 12,figure D-2) may be replaced by drilling out the two blindrivets (item 85, figure D-2), removing the two screws(item 88, figure D-2) and removing the hook (item 101,figure D-2) from the “D” ring on the shelter. Positionthe new cable assembly and install the appropriatehardware. Be sure to crimp the hook over the “D’’ ringto secure it.

(2) The ECU support shelf itself may bereplaced by removing the “D” ring as previouslyexplained and removing three screws (item 96,figure D-2). Reverse this procedure to install a newshelf support.

(3) The hinge (item 69, figure D-2) may bereplaced by removing three screws (item 96, figure D-2)and drilling out 13 rivets (item 97, figure D-2). Rivetthe replacement hinge to the shelter and reinstallthree screws.

d. Compressed Air Panel.

(1) The plug assembly (item 9, figure D-2)may be replaced by drilling the rivet (item 84,

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figure D-2), removing the old assembly and riv-eting a new assembly in its place.

(2) The compressed air panel assembly(item 8, figure D-2) may be replaced by removingthe air-oil separator (item 102, figure D-2), piping(items 65 and 66, figure D-2) and unbolting thepanel. Sealant (item 81, figure D-2) should be ap-plied to the new panel before it is bolted in place.Reinstall the piping and air-oil separator.

(3) The air-oil separator (item 102, figureD-2) may be replaced by removing two bolts andwashers (items 89 and 103, figure D-2) and dis-connecting the separator from the piping (item 65,figure D-2).

e. Fire Extinguisher Bracket. The fire extin-guisher bracket (item 99, figure D-2) may be re-placed by removing four bolts, Iockwashers andflat washers (items 112, 113 and 114, figure D-2)and installing a new bracket using the hardwareremoved from the old one.

f. Shelf/Table. The shelf/table (item 3, figureD-1) may be replaced by removing eight bolts(item 17, figure D-1) and installing a new sheIf/table using the hardware removed from the oldone.

g. Hook Board. The hook board (item 4, fig-ure D-1 ) may be replaced by removing two boltsand washers (items 13, 14 and 21, figure D-1) andinstalling a new hook board using the hardwareremoved from the old one.

3-4.

a

WARNING

All electrical repairs or replacementshould be performed by an aircraftelectrician or other qualified person.

Electrical Components Maintenance.

Shelter Power Cable.

(1) The shelter power cable (item 2, fig-ure D-4) should be carefully inspected for breaksin the jacket insulation and corrosion of the elec-trical contacts.

(2) The connectors (items 3 and 4, figureD-4) may be replaced using a standard bladescrewdriver to remove the connector covers andloosen the screws holding the wires in the con-tacts. Be sure to insert the wires in the same con-tact on the new connector that they were installedin on the old connector. Connectors should bewired in accordance with instructions given indrawing 4920-EG-058 (figure D-4).

WARNING

If connectors are improperly wired, aserious electrical shock hazard may re-sult.

(3) Following repairs or replacement ofparts to the shelter power cable, it should bechecked with an ohmeter for proper connectionsbetween connectors and to insure there are noshorts between contacts.

NOTE

The ground contact is bonded to theconnector case.

b. Light Fixtures. Light fixtures (item 53, fig-ure D-2) should be inspected for broken lampcontacts or other damage. The lamp (item 55, fig-ure D-2) and lamp protector (item 56, figure D-2)may be replaced by removing the screws (item107, figure D-2) holding the retaining straps (item54, figure D-2) to the light fixture. To replace thelight fixture assembly (item 5, figure D-2), firstturn off the 20 amp circuit breaker that suppliespower to the lights in the circuit breaker panel(items 29 and 30, figure D-2). Using a trouble lightto illuminate the shelter, remove the lamp andprotector as previously described. Remove thecover of the fixture, disconnect the power wires,remove the nut holding the conduit connector(item 36, figure D-2) to the fixture and remove thescrews and washers (items 95 and 111, figure D-2) securing the fixture to the ceiling. Feed powerwires through the end of the new fixture and se-cure to the ceiling with screws and washers(items 95 and 111, figure D-2). Install conduitconnector nut, connect power wires, install fixturecover, lamp, and lamp protector, then retainingstraps. Turn circuit breaker back on and insure thenew fixture is operating properly.

c. Power Inlet Panel.

(1) Inspect the power inlet panel (item 3,figure D-2) for loose ground stud (item 28, figureD-2), corroded power inlet connector (item 25,figure D-2) and damaged electrical outlet coverand connector (items 24 and 26, figure D-2), Re-place the power inlet connector (item 25, figureD-2) by first de-energizing and removing shelterpower cable. Next remove screws and power inletbox cover (item 17, figure D-2). Remove fourbolts, washers and nuts (items 108, 109 and 110,figure D-2) which hold connector to panel and,using a standard blade screwdriver, loosen con-tact screws and remove wires from contacts.

3-2 Change 1 *U.S. GOVERNMENT PRINTING OFFICE: 1993-555-028/80431

P T “

TM 55-4920-403-20&P

NOTE

Be sure to note which wires are con-nected to which number contact. Referto the shelter wiring diagram in drawing4920-EG-056 (figure D-2) for assistance.Install the new receptacle by insertingand securing the wires first. Then installthe mounting hardware and reinstall thepower inlet panel cover.

(2) The ground stud (item 28, figure D-2)may be replaced by de-energizing the shelter, re-moving ground stake wire and removing thepower inlet box cover as previously described.

As an extra safety precaution, removethe shelter power cable from the powerinlet connector.

(3) Loosen the nut securing the stud and re-move the damaged stud. Clean away any build upof corrosion then install a new ground stud, se-cure the inside ground wire, and tighten themounting nut. Replace the power box cover, fas-ten the ground stake wire outside, and reconnectthe shelter power cable.

(4) Replacement of the weatherproof outletcover (item 24, figure D-2) should be preceded byturning off the circuit breaker supplying power tothe outlet. Remove the screw holding the weather-proof cover in palce and replace. If the outlet(item 26, figure D-2) needs replacement, de-ener-gize the shelter and remove the power inlet boxcover as previously described. Remove screwsand nuts holding the outlet to the panel. Removethe wires from the connector and discard thedamaged connector. Install wires on the new con-nector, install mounting hardware, and weather-proof cover plate. Reinstall power box cover andenergize the shelter.

(5) Repairs to the power inlet panelshould be limited to replacing loose rivets and re-pairing dents and minor sheet metal punctures.

d. Circuit Breaker Panel.

(1) In the unlikely event the entire circuitbreaker panel (items 29 and 30, figure D-2) re-quires replacement due to damage to the case orelectrical damage to the bus bars, a new panelmay be installed, De-energize the shelter and re-move the power cable from the power inlet con-nector. Use a trouble light to illuminate the shel-ter. Remove the cover (item 30, figure D-2) anddisconnect all wires,

NOTE

Put a masking tape label on each wireas it is disconnected to aid in proper re-assembly.

(2) Loosen and remove all conduit con-nector retaining nuts. Remove four screws (item111, figure D-2) holding the panel to the backingplate. Install new paneI using the sheet metalscrews removed from the old one. Punch out ap-propriate knock-outs and insert conduit con-nectors. Install conduit connector retaining nuts.Install serviceable circuit breakers from the oldpanel or new ones by snapping them into place inthe same position as on the old panel. Connectwires as previously labeled and refer to the shelterwiring diagram in drawing 4920-EG-056 (figure D-2). Replace breaker panel cover and re-energizeshelter. Check all circuits for proper operation.

e. Circuit Breakers. Circuit breakers (items31, 32 and 33, figure D-2) are replaced when theybecome physically damaged or fail electrically tooperate properly. De-energize shelter and removeshelter power cable. Illuminate the shelter with atrouble light. Remove circuit breaker panel cover(item 30, figure D-2). Disconnect the wire at-tached to the circuit breaker and remove thebreaker by pulling outward and to the side. Snapin a proper size replacement, reconnect the wireand reinstall panel cover. Re-energize the shelterand check circuit for proper operation.

f. ECU Power Cable.

(1) Check cable (item 44, figure D-2) forsigns of fraying, cracks, etc.

All repairs/replacement to the ECU ca-ble/connector should be performed withthe 30 amp 3 phase circuit breakerturned off.

(2) The power connector (item 27, figuremay be repaired by resoldering broken wires.D-2)

Minor damage to the cable jacket may be repairedby wrapping with plastic electricians tape. To-re-place the cable and connector, remove the boxcover plate (item 22, figure D-2) and disconnectthe cable wires. Loosen the cable clamp (item 35,figure D-2) and remove cable. Install new cableand tighten clamp. Connect cable wires to shelterwiring and solder connector (item 27, figure D-2)to free end of cable in accordance with shelterwiring diagram in drawing 4920-EG-056 (figure D-2). Test connector with an ohmeter for shorts be-tween contacts.

Change 1 3-3

TM 55-4920-403-20&P

CAUTION

Be sure that power is off before testingany circuit with an ohmeter.

(3) Test connector with a suitable volt-meter for proper phase connections.

NOTE

ECU has 3 phase motors which willma / func t ion i f p roper phase con-nections are not maintained.

g. Inside Electrical Outlets. Turn off circuit

breaker supplying power to the inside electricaloutlets. Remove cover plate (item 23, figure D-2),remove screws securing receptacle (item 26, fig-ure D-2) to box and remove wires from recep-tacle. Install new receptacle connecting wires thesame as on the old one. Install mounting screwsand cover plate. Turn on circuit breaker andcheck circuit for proper operation.

3-5. Major TOE Maintenance. Maintain all majorTOE items in accordance with applicable TMs,some of which are called out in the remarks sec-tion of the MAC chart.

3-4

TM 55-4920-403-20&P

A P P E N D I X A

R E F E R E N C E S

A-1. General. Consult the following publications frequently for the latest changes or revisions of refer-ences and for new publications relating to material covered in this manual.

A-2. Forms.

DA Form 2028

DA Form 2407

A-3. Publications.DA PAM 738-751

TM 740-90-1

TM 750-244-3

TM 5-4120-352-14

TM 5-4120-352-20P

TB 43-0124

SC 4920-99-CL-A92

TM 11-5410-213-14P

TM 9-2330-285-14

TM 5-6115-275-14

TM 5-6115-275-24P

TB 43-180

TC 11-6

Recommended Changes to Publications and Blank Forms

Maintenance Request

Functional Users Manual for The Army Maintenance Management SystemAviation (TAMMS-A)Administrative Storage of Equipment

Procedures for Destruction of Equipment to Prevent Enemy Use (MobilityEquipment Command)

Operator, Organizational, Direct Support and General Support MaintenanceManual Air Conditioner, Horizontal Compact, 9,000 BTU (Frame Models)

Organizational Maintenance Repair Parts and Special Tools List for Air Condi-tioner, Horizontal, Compact 9000 BTU

Maintenance and Repair Procedures for S-141/G, S-144/G, S-250/G, S-280/Gand S-318/G Type Shelters

Tool Set, Aviation Unit Maintenance Company Size, Set No. 2, Airmobile

Operator, Organizational, DS, GS and Depot Maintenance Repair Parts and Spe-cial Tools List Shelter, Electrical Equipment S-280A/G and S-280 B/G

Operator, Organizational, DS and GS Maintenance Manual M-720 Dolly Set

Operator, Organizational, DS and GS Maintenance Manual for Generator Set 10KW

Operator, Organizational, DS and GS Maintenance Repair Parts and SpecialTools List for Generator Set 10 KW

Calibration Requirements for Army Material

Grounding Techniques

Change 2 A-1/(A-2 blank)

TM 55-4920-403-20&P

A P P E N D I X B

M A I N T E N A N C E A L L O C A T I O N C H A R T

S e c t i o n I . I N T R O D U C T I O N

B-1. General. g. Install. The act of emplacing, seating or

a. This section provides a general expla-fixing into position an item, part, or module (com-

onation of all maintenance and repair functions au-ponent or assembly) in a manner to allow the

thorized at various maintenance levels.proper functioning of an equipment or system.

b. The maintenance allocation chart (MAC)in Section II designates overall responsibility forthe performance of maintenance functions on theidentified end item or component. The imple-mentation of the maintenance functions upon theend item or component will be consistent with theassigned maintenance functions.

B-2. Maintenance Functions.

a. Inspect. To determine the serviceability ofan item by comparing its physical, mechanicaland/or electrical characteristics with establishedstandards through examination.

b. Test. To verify serviceability and detect in-cipient failure by measuring the mechanical orelectrical characteristics or an item and com-paring those characteristics with prescribed stan-dards,

c. Service. Operations required periodicallyto keep an item in proper operating condition, i.e.,to clean (decontaminate), preserve, drain, paint,or replenish fuel, lubricants, hydraulic fluids, orcompressed air supplies.

cf. Adjust. To maintain, within prescribed lim-its, by bringing into or exact position, or by set-ting the operating characteristics to specified pa-rameters.

e. Align. To adjust specified variable ele-ments of an item to bring about optimum or de-sired performance.

f. Calibrate. To determine and cause cor-rections to be made or to be adjusted on instru-ments or test, measuring and diagnostic equip-ment used in precision measurement. Consists ofcomparisons of two instruments, one of which is acertified standard of known accuracy, to detectand adjust any discrepancy in the accuracy of theinstrument being compared.

h. Replace. The act of substituting a ser-viceable like part, subassembly or module (com-ponent or assembly) for an unserviceable coun-terpart.

i. Repair. The application of maintenanceservices or other maintenance actions to restoreserviceability to an item by correcting specificdamage, fault, malfunction or failure in a part,subassembly, module (component or assembly),end item or system.

j. Overhaul. That maintenance effort (ser-vices/actions) necessary to restore an item to acompletely serviceable/operational conditionalprescribed by maintenance standards (i. e.,DMWR) in appropriate technical publications.Overhaul is normally the highest degree of main-tenance performed by the Army. Overhaul doesnot normally return an item to like new condition.

k. Rebuild. Consists of those services/ac-t ions necessary for the restorat ion of un-serviceable equipment to a like new condition inaccordance with original manufacturing stan-dards. Rebuild is the highest degree of materialmaintenance applied to Army equipment. The re-build operation includes the act of returning tozero those age measurements (hours/miles, etc.)considered in c lassi fy ing Army equipments/components.

B-3. Explanation of Columns in the MaintenanceAllocation Chart.

a. Column 1, Group Number, Column 1 listsgroup numbers, the purpose of which is to iden-tify components, assemblies, subassemblies andmodules with the next higher assembly.

B-1

TM 55-4920-403-20&P

b. Colurnn 2, Cornponent/Assernb/y. Column2 contains the name of components, assemblies,subassemblies and modules for which mainte-nance is authorized.

c. Column 3, Maintenance Functions. Col-umn 3 lists the functions to be performed on theitem listed in column 2. (For detailed explanationof these functions, see paragraph B-2.)

d. Column 4, Maintenance Level. Column 4specifies, by the listing of a “work time” figure inthe appropriate subcolumn(s), the lowest level ofmaintenance authorized to perform the functionlisted in column 3. This figure represents the ac-tive time required to perform the maintenancefunction at the indicated level of maintenance. Ifthe number of complexity of the tasks within thelisted maintenance function vary at different main-tenance levels, appropriate “work time” figureswill be shown for each level. The number of man-hours specified by the “work time” figure repres-ents the average time required to restore an item(assembly, subassembly, component, module, enditem or system) to a serviceable condition under

typical field operating conditions. This time in-eludes preparation time, troubleshooting time andquality assurance/quality control time in additionto the time required to perform the specific tasksidentified for the maintenance functions author-ized in the maintenance allocation chart. Thesymbol designations for the various maintenancelevels are as follows:

AVUM - Operator or Crew.

e. Column 5, Tools and Equipment. Column5 specifies, by code, those common tool sets (notindividual tools) and special tools, TMDE andsupport equipment required to perform the desig-nated function.

f. Column 6, Remarks. This column shall,when applicable, contain a letter code, in alpha-betical order, which shall be keyed to the remarkscontained in Section IV.

NOTE

Excessive or extensive damage beyondAVUM No. 2 repair or replacement ca-pability should be returned to depot foroverhaul.

Sect ion I l l . SPECIAL TOOL AND SPECIAL TEST EQUIPMENT REQUIREMENTS

No special tools or test equipment required.

Sect ion IV . MAINTENANCE ALLOCATION CHART REMARKS

B-4. Explanations. c. Inspect and maintain in accordance with

a. Refer to TB 43-0124 and TM 11-5410-213- TM 5-6115-275-14 and TM 5-6115-275-24P.

14P for shelter repairs and replacement parts. d. Inspect and maintain in accordance with

b. Inspect and maintain in accordance withTM 9-2330-285-14.

TM 5-4120-352-14 and TM 5-4120-352-20P. e. Maintain in accordance with applicableTMs.

B-2 Change 2

APPENDIX B TM 55-4920-403-23&P

B-3

TM 55-4920-403-23&P

APPENDIX B

B-4

TM 55-4920-403-20&P

A P P E N D I X C

R E P A I R P A R T S A N D S P E C I A L T O O L S L I S T

( C u r r e n t a s o f 2 2 N O V E M B E R

S e c t i o n I . I N T R O D U C T I O N

C-1. Scope.

This appendix lists spares and repair parts re-quired for performance of Aviation Unit Mainte-nance (AVUM) of the Shelter Assembly, P/N49Z0EG056-1, NSN 4920-01-9004. It authorizesthe requisitioning and issue of spares and repairparts as indicated by the source and mainte-nance codes.

C-2. General.

This Repair Parts and Special Tools List is di-vided into the following sections:

a. Section II. Repair Parts List. A list ofspares and repair parts authorized for use in theperformance of maintenance.

b. Section III. Special Tools List. Not Appli-cable.

c. Section IV. National Stock Number andPart Number Index. A list, in National ItemIdentification Number (NIIN) sequence of allNational Stock numbers (NSN) appearing in thelistings, followed by a list, in alphameric se-quence, of all part numbers appearing in thelistings. National stock numbers and part num-bers are cross-referenced to each illustration fig-ure and item number appearance.

C-3. Explanation of Columns.

a. Illustration. This column is divided asfollows:

(1) Figure Number. Indicates the figurenumber of the illustration on which the item isshown.

(2) Item Number. The number used toidentify each item called out in the illustration.

b. Source, Maintenance and RecoverabilityCodes (SMR).

(1) Source Code. Source codes indicatethe manner of acquiring support items for main-tenance, repair or overhaul of end items. Sourcecodes are entered in the first and second posi-t ions of the Uniform SMR Code format asfollows:

Code

PB

X A

X D

XC

1 9 7 7 )

Definition

Item procured and stocked for in-surance purpose because essen-t ia l i ty dictates that a minimumquantity be available in the supplysystems.

Item is not procured or stocked be-cause the requirements for the itemwill result in the replacement ofthe next higher assembly.

A support item that is not stocked.When required, item will be pro-cu red th rough t no rma l supp lychannels.

Installation drawing, diagram, in-- .struction sheet, field service draw-ing, that is identified by manu-facturer’s part number.

N O T E

Cannibalization or salvage may beused as a source of supply for anyitems source coded above, except thosecoded XA and aircraft support itemsas restricted by AR 700-42.

(2) Maintenance Code. M a i n t e n a n c ecodes are assigned to indicate the levels of main-tenance authorized to USE and REPAIR sup-port items. The maintenance codes are enteredin the third and fourth positions of the UniformSMR Code format as follows:

(a) The maintenance code enteredin the third position will indicate the lowestmaintenance level authorized to remove, replaceand use the support item. The maintenance codeentered in the third position will indicate the fol-lowing level of maintenance:

Code Appl icat ion/Explanat ion

O Support item is removed, replaced,———used at the Aviation Unit Mainte-nance level.

C-1

TM 55-4920-403-20&P

(b) The maintenance code enteredin the fourth position indicates whether the itemis to be repaired and identifies the lowest main-tenance level with the capability to performcomplete repair (i.e., all authorized maintenancefunctions). This position will contain the follow-ing maintenance code:

Code Appl icat ion/Explanat ion

Z —— N o n r e p a r a b l e . NO r e p a i r i sauthorized.

(3) Recoverability Code. Recoverabilitycodes are assigned to support items to indicatethe disposition action on unserviceable items.The recoverability code is entered in the fifthposition of the Uniform SMR Code format asfollows:

Code Definition

Z ——— Nonreparab le i tem. When un-serviceable, condemn and disposeat the level indicated in position 3.

c. National Stock Number. Indicates theNational stock number assigned to the item andwhich will be used for requisitioning purposes.

d. Par t Number . Ind ica tes the p r imarynumber used by the manufacturer (individual,company, firm corporation, or Government ac-tivity), which controls the design and character-istics of the item by means of its engineeringdrawings, speci f icat ions standards and in-spection requirements, to identify an item orrange of items.

N O T E

When a stock numbered item is requi-sitioned, the item received may have adifferent part number than the partbeing replaced.

e. Federal Supply Code for Manufacturer(FSCM). The FSCM is a 5-digit numeric codelisted in SB 708-42 which is used to identify themanufacturer, distributor, or Government agen-cy, etc.

g. Unit of Measure (U/M). Indicates thestandard of the basic quantity of the listed itemas used in performing the actual maintenancefunction. This measure is expressed by a two-character alphabetical abbreviation (e.g., ea, in.,pr, etc.). When the unit of measure differs fromthe unit of issue, the lowest unit of issue thatwill satisfy the required units of measure will berequisitioned.

h. Quantity Incorporated in Unit. Indicatesthe quantity of the item used in the breakoutshown on the illustration figure, which is pre-pared for a functional group, subfunctionalgroup, or an assembly. A “V” appearing in thiscolumn in lieu of a quantity indicates that nospecific quantity is applicable (e.g., shims, spac-ers, etc.).

C-4.

C-5.

a.

Special Information. Not Applicable.

How to Locate Repair Parts.

When National Stock Number or PartNumber is Unknown:

(1) First. Find the il lustration coveringthe XXXX to which the item belongs.

(2) Second. Identify the item on the il-lustration and note the illustration figure anditem number of the item.

(3) Third. Using the Repair Parts List-ing, find the figure and item number noted onthe illustration.

b. When National Stock Number or PartNumber is known.

(1) First. Using the Index of NationalStock Numbers and Part Numbers, find the per-tinent National stock number or part number.This index is in ascending NIIN sequence fol-lowed by a list of part numbers in alphamericsequence, cross-referenced to the illustration fig-ure number and item number.

(2) Second. After finding the figure anditem number, locate the figure and item numberin the repair parts list.

C-6. Abbreviations. Not Applicable.

f. Description. Indicates the Federal itemname and, if required, a minimum description toidentify the item.

C-2

(1) (2) (3) TM55-492(5) (6) (7) (8)ILLUSTRATION DESCRIPTION QTY(A) (B) NATIONAL INCFIG ITEM SMR STOCK PART INNO NO CODE NUMBER FSCM NUMBER USABLE ON CODE U/M UNIT

BULK MATERIAL

BULK XDOZZ CONDUIT,THIN, WALL--1,049 IN. DIA FT V

BULK XDOZZ CONDUIT, THIN WALL--0.50 IN.DIA FT V

BULK XDOZZ 96906 MS35831-3E HINGE, BUTT--0.125 IN. THK FT V

BULK PBOZZ 9320-00-143-6952 RUBBER SHEET, CELLULAR--0.625 IN.THK,MIL-R-6130,TYPE II FT V

BULK PBOZZ 9320-00-232-2435 RUBBER SHEET, CELLULAR--0.125 IN.THK,MIL-R-6130,TYPE I FT V

CHANGE 2 C-5

TM55-4920-403-20&P

SECTION IV. NATIONAL STOCK NUMBER AND PART NUMBER INDEXFIGURE ITEM FIGURE ITEM

STOCK NUMBER NO NO STOCK NUMBER NO NO

5310-00-045-3296 D3 28 5325-00-290-8240 D2 1055310-00-058-1626 D3 37 5975-00-581-0768 D2 245310-00-113-3757 D3 33 5925-00-583-7941 D2 339320-00-143-6952 BULK 5310-00-584-5272 D3 326240-00-152-2987 D2 55 5325-00-637-2369 D2 1065310-00-167-0837 D3 35 5325-00-637-9541 D3 365310-00-167-0839 D3 31 4730-00-640-0254 D2 625975-00-188-1164 D2 23 5925-00-828-4018 D2 324730-00-196-1493 D2 65 5935-00-860-7319 D2 265306-00-208-6090 D3 34 5340-00-897-2542 D3 156210-00-229-5828 D2 53 5935-00-918-2302 D2 259320-00-232-2435 BULK 5310-00-934-9751 D3 294920-00-242-4101 D2 102 5925-00-968-1491 D2 314730-00-249-3917 D2 66 5305-00-984-7363 D3 274210-00-270-4512 D2 98 4920-01-044-2087 D4 15975-00-281-0090 D2 21 4920-01-052-5637 D5 1

4920-01-220-8035 D5 4

PART FIG ITEM PART FIG ITEMNUMBER FSCM NO NO NUMBER FSCM NO NO

AN5-7A 88044 D2 108 4002-7W 71286 D2 105AN6-33A 88044 D3 34 4920-EG-077-1 81996 D5 1AN8-27A 88044 D3 30 4920EG056-102 81996 D2 102AN912-5D 88044 D2 64 4920EG056-12 81996 D2 12AN960-616L 88044 D2 114 4920EG056-21 81996 D2 21AN960-616L 88044 D3 35 4920EG056-22 81996 D2 22AN960-818L 88044 D3 31 4920EG056-23 81996 D2 23AR48-922 15235 D2 25 4920EG056-24 81996 D2 24F40CW 08108 D2 55 4920EG056-26 81996 D2 26MS24641-53 96906 D3 23 4920EG056-3 81996 D2 3MS27950-2 96906 D2 100 4920EG056-31 81996 D2 31MS27953-1 96906 D2 101 4920EG056-32 81996 D2 32MS27954-1 96906 D2 77 4920EG056-33 81996 D2 33MS3106R18-11SC 96906 D2 27 4920EG056-34 81996 D2 34MS35191-272 96906 D3 27 4920EG056 35 81996 D2 35MS35291-60 96906 D2 112 4920EG056 36 81996 D2 36MS35338-43 96906 D3 28 4920EG056-37 81996 D2 37MS35338-45 96906 D2 110 4920EG056-38 81996 D2 38MS35338-46 96906 D2 113 4920EG056-53 81996 D2 53MS35338-46 96906 D3 36 4920EG056-62 81996 D2 62MS35338-48 96906 D3 32 4920EG056-65 81996 D2 65MS35650-302 96906 D3 29 4920EG056-66 81996 D2 66MS35650-3212 96906 D2 109 4920EG056-68 81996 D2 68MS35650-3382 96906 D3 37 4920EG056-8 81996 D2 8MS35650-3392 96906 D3 33 4920EG056-98 81996 D2 98MS35831-3E 96906 BULK 4920EG056-99 81996 D2 99MS51926-4 96906 D3 17 4920EG057-5 81996 D3 5MS51929-6 96906 D3 16 4920EG057-6 81996 D3 6S31KB425 25472 D3 25 4920EG057-7 81996 D3 7214-16 71286 D2 106 4920EG057-8 81996 D3 82260 83209 D2 56 4920EG058-2 81996 D4 13013W46 60680 D3 126 66R1-1-4 76786 D3 15

C-6A CHANGE 2 U.S. GOVERNMENT PRINTING OFFICE: 1987 - 754-030/60109

(1) (2) (3) TM55-492(5) (6) (7) (8)ILLUSTRATION QTY(A) (B) FEDERAL DESCRIPTION INCFIG ITEM SMR STOCK PART INNO NO CODE NUMBER NUMBER FSCM USABLE ON CODE U/M UNIT

BULK MATERIAL

BULK XDOZZ CONDUIT,THIN WALL--1.049 IN.DIA FT V

BULK XDOZZ CONDUIT,THIN WALL--0.50 IN.DIA FT V

BULK XDOZZ MS35831-96906 HINGE,BUTT--0.125 IN.THK FT V

BULK PBOZZ 9320-00-143-6952 RUBBER SHEET,CELLULAR--0.625 IN.THK,MIL-R-6130,TYPE II FT V

BULK PBOZZ 9320-00-232-2435 RUBBER SHEET,CELLULAR--0.1125 IN.THK,MIL-R-6130,TYPE I FT V

C-5

TM55-4920-403-20&P

SECTION IV. NATIONAL STOCK NUMBER AND PART NUMBER INDEXFIGURE ITEM FIGURE ITEM

STOCK NUMBER NO NO STOCK NUMBER NO NO

5310-00-045-3296 D3 28 5325-00-290-8240 D2 1055310-00-058-1626 D3 37 5975-00-581-0768 D2 245310-00-113-3757 D3 33 5925-00-583-7941 D2 339320-00-143-6952 BULK 5310-00-584-5272 D3 326240-00-152-2987 D2 55 5325-00-637-2369 D2 1065310-00-167-0837 D3 35 5310-00-637-9541 D3 365310-00-167-0839 D3 31 4730-00-640-0254 D2 625975-00-188-1164 D2 23 5925-00-828-4018 D2 324730-00-196-1493 D2 65 5935-00-860-7319 D2 265306-00-208-6090 D3 34 5340-00-897-2542 D3 156210-00-229-5828 D2 53 5935-00-918-2302 D2 259320-00-232-2435 BULK 5310-00-934-9751 D3 294920-00-242-4101 D2 102 5925-00-968-1491 D2 314730-00-249-3917 D2 66 5305-00-984-7363 D3 274210-00-270-4512 D2 98 4920-01-044-2087 D4 15975-00-281-0090 D2 21 4920-01-052-5637

PART FIG ITEM PART FIG ITEMNUMBER FSCM NO NO NUMBER FSCM NO NO

AN5-7A 88044 D2 108 4002-7W 71286 D2 105AN6-33A 88044 D3 34 4920-EG-077-1 81996 D5 1AN8-27A 88044 D3 30 4920EG056-102 81996 D2 102AN912-5D 88044 D2 64 4920EG056-12 81996 D2 12AN960-616L 88044 D2 114 4920EG056-21 81996 D2 21AN960-616L 88044 D3 35 4920EG056-22 81996 D2 22AN960-818L 88044 D3 31 4920EG056-23 81996 D2 23AR48-922 15235 D2 25 4920EG056-24 81996 D2 24F40CW 08108 D2 55 4920EG056-26 81996 D2 26MS24641-53 96906 D3 23 4920EG056-3 81996 D2 3MS27950-2 96906 D2 100 4920EG056-31 81996 D2 31MS27953-1 96906 D2 101 4920EG056-32 81996 D2 32MS27954-1 96906 D2 77 4920EG056-33 81996 D2 33MS3106R18-11SC 96906 D2 27 4920EG056-34 81996 D2 34MS35191-272 96906 D3 27 4920EG056-35 81996 D2 35MS35291-60 96906 D2 112 4920EG056-36 81996 D2 36MS35338-43 96906 D3 28 4920EG056-37 81996 D2 37MS35338-45 96906 D2 110 4920EG056-38 81996 D2 38MS35338-46 96906 D2 113 4920EG056-53 81996 D2 53MS35338-46 96906 D3 36 4920EG056-62 81996 D2 62MS35338-48 96906 D3 32 4920EG056-65 81996 D2 65MS35650-302 96906 D3 29 4920EG056-66 81996 D2 66MS35650-3212 96906 D2 109 4920EG056-68 81996 D2 68MS35650-3382 96906 D3 37 4920EG056-8 81996 D2 8MS35650-3392 96906 D3 33 4920EG056-98 81996 D2 98MS35831-3E 96906 BULK 4920EG056-99 81996 D2 99MS51926-4 96906 D3 17 4920EG057-5 81996 D3 5MS51929-6 96906 D3 16 4920EG057-6 81996 D3 6S31KB425 25472 D3 25 4920EG057-7 81996 D3 7214-16 71286 D2 106 4920EG057-8 81996 D3 82260 83209 D2 56 4920EG058-2 81996 D4 13013W46 60680 D2 105 662R1-1-4 76786 D3 15

C-6

TM 55-4920-403-20&P

A P P E N D I X D

S H E L T E R D R A W I N G S

Shelter drawings are located in this appendix section.

D-1/(D-2 blank)

D-3/(D-4 blank)Figure D-1.

Figure D-1.D-5/(D-6 blank)

Figure D-2.D-35/D-36 blank)

Figure D-3.

D-61/(D-62 blank)

Figure D-6.

D-107/(D-108 blank)

TM 55-4920-403-20&P

Figure D-7. Environmental control unit (ECU) - location/mounting for transport.

D-111/(D-112 blank)


Official:J. C. PENNINGTON

Brigadier General, United States ArmyThe Adjutant General

BERNARD W. ROGERSGeneral, United States Army

Chief of Staff

DISTRIBUTION:To be distr ibuted in accordance with DA Form 12-31 Organizat ional Maintenance

Requirements for Al l Fixed and Rotor Wing Aircraf t .

*U.S. GOVERNMENT PRINTING OFFICE: 1978–765-117/146

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