407-MM-CH96

BHT-407-MM-10

96-00-0023 SEP 2011 Rev. 33 Page 1ECCN EAR99

TABLE OF CONTENTS

Paragraph Chapter/Section Page Number Title Number Number

CHAPTER 96 ELECTRICAL

ELECTRICAL SYSTEMS

96-1 General Description ....................................................................... 96-00-00 2996-2 Electrical Safety and Hazards................................................... 96-00-00 3096-3 Safety Practices General.............................................. 96-00-00 3096-4 Standard Practices Electrical Maintenance or

Repairs.............................................................................. 96-00-00 3096-5 Standard Practices Electrical Work In Confined

Spaces .............................................................................. 96-00-00 3196-6 Standard Practices After Electrical Maintenance

or Repairs ......................................................................... 96-00-00 3196-7 Miscellaneous Electrical Tools....................................................... 96-00-00 3196-8 Electrical Systems.......................................................................... 96-00-00 3396-9 Operational Checks, Functional Checks, and Troubleshooting

Charts ............................................................................................ 96-00-00 3696-10 General Troubleshooting ............................................................... 96-00-00 3696-11 Miscellaneous Electrical Components Maintenance Practices . 96-00-00 3696-12 Miscellaneous Electrical Components Removal .................. 96-00-00 3696-13 Miscellaneous Electrical Components Cleaning .................. 96-00-00 3796-14 Miscellaneous Electrical Components Inspection ................ 96-00-00 3796-15 Miscellaneous Electrical Components Installation ............... 96-00-00 3796-16 Semiconductor Devices Description.......................................... 96-00-00 4096-17 Standard and Zener Diodes Description .............................. 96-00-00 4096-18 Standard and Zener Diodes Functional Check .................... 96-00-00 4096-19 Transient Suppression Diode Assemblies Description ........ 96-00-00 4496-20 Transient Suppression Diode Assemblies Functional

Check........................................................................................ 96-00-00 4496-21 Transistor Negative Positive Negative (NPN) Description ... 96-00-00 4496-22 Transistor (NPN) Functional Check ..................................... 96-00-00 4496-23 Semiconductor Devices Maintenance Practices .......... 96-00-00 4496-24 Control Panels Electrical ...................................................... 96-00-00 4496-25 Control Panels Removal............................................... 96-00-00 4496-26 Control Panels Inspection ............................................ 96-00-00 4796-27 Control Panels Repair .................................................. 96-00-00 4796-28 Control Panels Installation............................................ 96-00-00 4796-29 Circuit Breakers ........................................................................ 96-00-00 4796-30 Circuit Breaker Removal .............................................. 96-00-00 4796-31 Circuit Breaker Inspection ............................................ 96-00-00 4896-32 Circuit Breaker Installation ........................................... 96-00-00 4896-33 Electrical Load Analysis ................................................................. 96-00-00 4896-34 DC Generator Output Load Capacity........................................ 96-00-00 4896-35 Electrical and Electronic Components Reference Designator... 96-00-00 5796-36 Electrical Components and Assemblies Reference

Designator Assignment............................................................. 96-00-00 57

BHT-407-MM-10

96-00-00Page 2 Rev. 33 23 SEP 2011 ECCN EAR99

TABLE OF CONTENTS (CONT)


96-37 Electrical and Electronic Components, ReferenceDesignator/Description/Location Reference Table andLocation Figure ......................................................................... 96-00-00 58

96-38 Circuit, Wires, and Cable Harness Designations ...................... 96-00-00 16396-39 Wire Identification Code Description .................................... 96-00-00 16396-40 Wire Harness and Cable Designation....................................... 96-00-00 163

DC POWER SYSTEM

96-41 DC Power System.......................................................................... 96-00-00 16796-42 Battery System............................................................................... 96-00-00 16796-43 Battery ...................................................................................... 96-00-00 16796-44 Battery General Warnings.................................................... 96-00-00 16996-45 Battery Vent .............................................................................. 96-00-00 16996-46 Battery Relay (2K1) .................................................................. 96-00-00 16996-47 Battery Switch (2S1) ................................................................. 96-00-00 17096-48 Battery System Operation .................................................... 96-00-00 17096-49 Battery System Operational Check .............................. 96-00-00 17096-50 17 Amp/Hour Battery Removal..................................... 96-00-00 17496-51 28 Amp/Hour Battery Removal..................................... 96-00-00 17796-52 Battery Maintenance Practices..................................... 96-00-00 17796-53 Battery Charging Procedure (17 Amp/Hour and

28 Amp/Hour Batteries) .................................................... 96-00-00 17996-54 Battery External Inspection .......................................... 96-00-00 17996-55 Battery Case and Battery Compartment Cleaning ....... 96-00-00 17996-56 17 Amp/Hour Battery Installation.................................. 96-00-00 18096-57 28 Amp/Hour Battery Installation.................................. 96-00-00 18196-58 Battery Relay (2K1) Removal....................................... 96-00-00 18296-59 Battery Relay (2K1) Installation.................................... 96-00-00 18296-60 External DC Power System Description.................................... 96-00-00 18496-61 External Power Receptacle ...................................................... 96-00-00 18496-62 External Power Relay (2K2) ..................................................... 96-00-00 18496-63 External DC Power Operation.............................................. 96-00-00 18496-64 External DC Power Operational Check ........................ 96-00-00 18696-65 External Power Relay (2K2) Removal.......................... 96-00-00 18696-66 External Power Relay (2K2) Installation....................... 96-00-00 18896-67 External Power Receptacle Replacement.................... 96-00-00 18896-68 Start and Ignition System............................................................... 96-00-00 18896-69 Start Switch (4A1S3) Description......................................... 96-00-00 19096-70 FADEC/Start Relay (1K3) Description ................................. 96-00-00 19096-71 FADEC Mode Switch (1S18) Description............................. 96-00-00 19496-72 FADEC/ECU (1A50) ................................................................. 96-00-00 19496-73 STARTER RELAY (1K1) Description................................... 96-00-00 19596-74 Ignitor Relay (2K4) Description ............................................ 96-00-00 19596-75 Voltage Regulator (2VR1)......................................................... 96-00-00 19696-76 Starter Generator (2MG1)......................................................... 96-00-00 19696-77 Ignitor Exciter Box, Ignitor Lead, and Spark Ignitor

Description ........................................................................... 96-00-00 196

BHT-407-MM-10




96-78 Start and Ignitor System Operation...................................... 96-00-00 19796-79 Auto Mode Simplified Operational Description..................... 96-00-00 19796-80 Manual Mode Simplified Operational Description ................ 96-00-00 19896-81 Automatic Mode Full Operational Description...................... 96-00-00 19896-82 Manual Mode Full Operational Description .......................... 96-00-00 20096-83 Start and Ignition System Operational Check ...................... 96-00-00 20196-84 Start Latching Circuit Functional Check ............................... 96-00-00 20696-85 Ignitor Circuit Functional Check (S/N 53000 Through

54299)....................................................................................... 96-00-00 21096-86 Starter Generator (2MG1) Maintenance Practices............... 96-00-00 21296-87 Voltage Regulator (2VR1) Removal and Installation............ 96-00-00 21296-88 FADEC/ECU (1A50) Removal and Installation .................... 96-00-00 21296-89 Ignitor Exciter Box and Spark Ignitor Removal and

Installation................................................................................. 96-00-00 21296-90 Base Mounted Relays, Engine Out Relay (1K2), FADEC/Start

Relay (1K3), and Ignitor Relay (2K4) Removal .................... 96-00-00 21296-91 Base Mounted Relays, Engine Out Relay (1K2), FADEC/Start

Relay (1K3), and Ignitor Relay (2K4) Installation ................. 96-00-00 21396-92 Starter Relay (1K1) Removal ............................................... 96-00-00 21796-93 Starter Relay (1K1) Installation ............................................ 96-00-00 21996-94 FADEC Mode Switch (1S18) Removal (S/N 53000

Through 54299) ........................................................................ 96-00-00 21996-95 FADEC Mode Switch (1S18) Installation (S/N 53000

Through 54299) ........................................................................ 96-00-00 22196-96 FADEC Mode Switch (1S18) Operational Check

(S/N 53000 and Subsequent) ................................................... 96-00-00 22296-97 FADEC Mode Switch (1S18) Functional Check (S/N 53000

and Subsequent) ...................................................................... 96-00-00 22296-98 FADEC Mode Switch Lamps Removal (S/N 53000

Through 54299) ........................................................................ 96-00-00 22496-99 FADEC Mode Switch Lamps Installation (S/N 53000

Through 54299) ........................................................................ 96-00-00 22596-100 Generator System.......................................................................... 96-00-00 22596-101 Generator Reset Switch (2S2).................................................. 96-00-00 22796-102 Voltage Regulator (2VR1)......................................................... 96-00-00 22796-103 Start and Regulation ......................................................... 96-00-00 22796-104 Overvoltage....................................................................... 96-00-00 22996-105 Undervoltage..................................................................... 96-00-00 22996-106 Generator Reverse Current .............................................. 96-00-00 22996-107 Starter Generator (2MG1)......................................................... 96-00-00 22996-108 Generator Relay (2K3).............................................................. 96-00-00 23096-109 Shunt (2R1) and Ammeter Indication ....................................... 96-00-00 23096-110 Generator System Operation ............................................... 96-00-00 23296-111 Generator System Operational Check ......................... 96-00-00 23296-112 Voltage Regulator (2VR1) Adjustment ......................... 96-00-00 23596-113 Voltage Regulator (2VR1) Inspection........................... 96-00-00 24296-114 Starter Generator (2MG1) Inspection........................... 96-00-00 242

BHT-407-MM-10




96-115 Starter Generator (2MG1) Repair................................. 96-00-00 24396-116 Generator Reset Switch (2S2) Removal and

Installation......................................................................... 96-00-00 24396-117 Voltage Regulator (2VR1) Removal ............................. 96-00-00 24396-118 Voltage Regulator (2VR1) Installation .......................... 96-00-00 24396-119 Generator Relay (2K3) Removal .................................. 96-00-00 24896-120 Generator Relay (2K3) Installation ............................... 96-00-00 24896-121 Starter Generator (2MG1) Removal ............................. 96-00-00 25096-122 Starter Generator (2MG1) Installation .......................... 96-00-00 25096-123 Shunt Resistor (2R1) Removal and Installation ........... 96-00-00 250

CAUTION/WARNING/ADVISORY (407) AND CREW ALERTING SYSTEM (407GX)

96-124 Caution/Warning/Advisory (407) and Crew Alerting System(407GX) ......................................................................................... 96-00-00 251

96-125 Caution/Warning/Advisory Panel (4DS1) (S/N 53000 Through54299)....................................................................................... 96-00-00 251

96-126 Crew Alerting System (CAS) (S/N 54300 and Subsequent)..... 96-00-00 25196-127 Audio Alert Activation and Description (S/N 54300 and

Subsequent) ............................................................................. 96-00-00 25996-128 Audio Alert Test (S/N 54300 and Subsequent)......................... 96-00-00 25996-129 Master Warning/Caution System PBA Operation

(S/N 54300 and Subsequent) ........................................... 96-00-00 25996-130 Master Warning/Caution System PBA Removal and

Installation (S/N 54300 and Subsequent) ......................... 96-00-00 25996-131 Master Warning/Caution PBA System Operational

Check (S/N 54300 and Subsequent) ................................ 96-00-00 26296-132 Caution/Warning/Advisory Panel (4DS1) (S/N 53000 Through

54299) Functional Check ..................................................... 96-00-00 26696-133 Caution/Warning/Advisory Panel (4DS1) Lamps

Replacement (S/N 53000 Through 54299) .......................... 96-00-00 26796-134 Caution/Warning/Advisory Panel (4DS1), Individual

Annunciator Lens Replacement (S/N 53000 Through 54299) 96-00-00 26996-135 Caution/Warning/Advisory Panel (4DS1) Removal

(S/N 53000 Through 54299) ............................................. 96-00-00 27196-136 Caution/Warning/Advisory Panel (4DS1) Installation

(S/N 53000 Through 54299) ............................................. 96-00-00 27196-137 FLOAT TEST Annunciator Circuit Operation ....................... 96-00-00 27196-138 FLOAT TEST Annunciator Circuit Operational Check . 96-00-00 27596-139 FLOAT TEST Annunciator Circuit Component

Replacement..................................................................... 96-00-00 27596-140 FLOAT ARM Annunciator Circuit Operation ........................ 96-00-00 27996-141 FLOAT ARM Annunciator Circuit Operational Check... 96-00-00 27996-142 FLOAT ARM Annunciator Circuit Component

Replacement..................................................................... 96-00-00 28396-143 ENGINE FIRE Annunciator Circuit Operation ...................... 96-00-00 28396-144 ENGINE FIRE Annunciator Circuit Operational

Check................................................................................ 96-00-00 283

BHT-407-MM-10




96-145 ENGINE FIRE Annunciator Circuit Functional Check .. 96-00-00 28796-146 ENGINE FIRE Annunciator Circuit Component

Replacement..................................................................... 96-00-00 28796-147 ENGINE ANTI-ICE Annunciator Circuit Operation............... 96-00-00 28796-148 ENGINE ANTI-ICE Annunciator Circuit Operational

Check................................................................................ 96-00-00 28796-149 Engine Anti-ice Pressure Switch (1S50) Removal ....... 96-00-00 29096-150 Engine Anti-ice Pressure Switch (1S50) Functional

Check................................................................................ 96-00-00 29096-151 Engine Anti-ice Pressure Switch (1S50) Installation .... 96-00-00 29396-152 Auto Relight Mode (AUTO RELIGHT) Annunciator Circuit

Operation ............................................................................. 96-00-00 29396-153 AUTO RELIGHT Annunciator Circuit Operational

Check................................................................................ 96-00-00 29596-154 AUTO RELIGHT Annunciator Circuit Component

Replacement..................................................................... 96-00-00 29596-155 START Annunciator Circuit Operation ................................. 96-00-00 29896-156 START Annunciator Circuit Operational Check ........... 96-00-00 29896-157 START Annunciator Circuit Component Replacement 96-00-00 30196-158 BAGGAGE DOOR Annunciator Circuit Operation ............... 96-00-00 30196-159 BAGGAGE DOOR Annunciator Circuit Operational

Check................................................................................ 96-00-00 30196-160 Baggage Door Switch (4S6) Removal.......................... 96-00-00 30696-161 Baggage Door Switch (4S6) Installation....................... 96-00-00 30696-162 Baggage Door Switch (4S6) Adjustment...................... 96-00-00 30696-163 Litter Door Open (LITTER DOOR) Annunciator Circuit

Operation ............................................................................. 96-00-00 30696-164 LITTER DOOR Annunciator Circuit Operational

Check................................................................................ 96-00-00 30696-165 Litter Door Switch (24S6) Removal and Installation..... 96-00-00 31096-166 HEATER OVERTEMP Annunciator Circuit Operation ......... 96-00-00 31096-167 HEATER OVERTEMP Annunciator Circuit

Operational Check and Troubleshooting...................... 96-00-00 31096-168 HEATER OVERTEMP Annunciator Circuit

Component Replacement............................................. 96-00-00 31096-169 L/FUEL BOOST Annunciator Circuit Operation ................... 96-00-00 31396-170 L/FUEL BOOST Annunciator Circuit Operational

Check................................................................................ 96-00-00 31396-171 Left Boost Pump Fuel Pressure Switch (1S22)

Functional Check.......................................................... 96-00-00 31796-172 Left Boost Pump Fuel Pressure Switch (1S22)

Removal ....................................................................... 96-00-00 31796-173 Left Boost Pump Fuel Pressure Switch (1S22)

Installation .................................................................... 96-00-00 32096-174 L/FUEL BOOST Annunciator Circuit Component

Replacement..................................................................... 96-00-00 321

BHT-407-MM-10




96-175 Left and Right Fuel Transfer Pump (L/FUEL XFR,R/FUEL XFR) Annunciators Circuit Operation (S/N 53000Through 53174) ........................................................................ 96-00-00 321

96-176 Left and Right Fuel Transfer Pump (L/FUEL XFR, R/FUEL XFR)Annunciators Circuit Operation (S/N 53175 Through 54299) 96-00-00 324

96-177 Left and Right Fuel Transfer Pump (L/FUEL XFR, R/FUEL XFR)Annunciators Circuit Operation (S/N 54300 and Subsequent) 96-00-00 327

96-178 Left and Right Fuel Transfer Pump (L/FUEL XFR,R/FUEL XFR) Annunciators Operational Check(S/N 53000 Through 53174 Pre TB 407-08-85)................ 96-00-00 330

96-179 Left and Right Fuel Transfer Pump (L/FUEL XFR,R/FUEL XFR) Annunciators Operational Check(S/N 53000 Through 53799 Post TB 407-08-85 andS/N 53800 Through 54299) .............................................. 96-00-00 333

96-180 Left and Right Fuel Transfer Pump (L/FUEL XFR,R/FUEL XFR) Annunciators Operational Check(S/N 54300 and Subsequent) ........................................... 96-00-00 342

96-181 Left and Right Transfer Pump Fuel Pressure Switches(1S24 and 1S23) Functional Check ............................. 96-00-00 348

96-182 Left Transfer Pump Fuel Pressure Switch (1S24) Removal ....................................................................... 96-00-00 348

96-183 Left Transfer Pump Fuel Pressure Switch (1S24) Installation .................................................................... 96-00-00 351

96-184 Right Transfer Pump Fuel Pressure Switch (1S23) Removal ....................................................................... 96-00-00 352

96-185 Right Transfer Pump Fuel Pressure Switch (1S23) Installation .................................................................... 96-00-00 353

96-186 Left and Right Transfer Pump Annunciators ComponentReplacement..................................................................... 96-00-00 355

96-187 FUEL FILTER Annunciator Circuit Operation ...................... 96-00-00 35596-188 FUEL FILTER Annunciator Circuit Operational Check. 96-00-00 35796-189 FUEL FILTER Annunciator Component Replacement

(S/N 53000 Through 54299) ............................................. 96-00-00 35796-190 R/FUEL BOOST Annunciator Circuit Operation................... 96-00-00 35796-191 R/FUEL BOOST Annunciator Circuit Operational

Check................................................................................ 96-00-00 36196-192 Right Boost Pump Fuel Pressure Switch (1S21)

Functional Check.......................................................... 96-00-00 36196-193 Right Boost Pump Fuel Pressure Switch (1S21)

Removal ....................................................................... 96-00-00 36496-194 Right Boost Pump Fuel Pressure Switch (1S21)

Installation .................................................................... 96-00-00 36596-195 Right Boost Pump Annunciator Circuit Component

Replacement..................................................................... 96-00-00 36796-196 FUEL VALVE Annunciator Circuit Operation ....................... 96-00-00 36896-197 FUEL VALVE Annunciator Circuit Operational Check . 96-00-00 368

BHT-407-MM-10




96-198 Fuel Shutoff Valve Relay (1K6) Removal (S/N 53000Through 54299) ................................................................ 96-00-00 375

96-199 Fuel Shutoff Valve Relay (1K6) Installation (S/N 53000Through 54299) ................................................................ 96-00-00 375

96-200 FUEL VALVE Annunciator Circuit ComponentReplacement..................................................................... 96-00-00 377

96-201 FADEC FAULT Annunciator Circuit Operation .................... 96-00-00 37796-202 FADEC FAULT Annunciator Circuit Operational

Check................................................................................ 96-00-00 37796-203 FADEC FAULT Annunciator Circuit Functional

Check................................................................................ 96-00-00 37996-204 FADEC FAULT Annunciator Circuit Component

Replacement..................................................................... 96-00-00 38196-205 RESTART FAULT Annunciator Circuit Operation................ 96-00-00 38196-206 RESTART FAULT Annunciator Circuit Operational

Check................................................................................ 96-00-00 38196-207 RESTART FAULT Annunciator Circuit Functional

Check................................................................................ 96-00-00 38496-208 RESTART FAULT Annunciator Circuit Component

Replacement..................................................................... 96-00-00 38796-209 FUEL LOW Annunciator Circuit Operation........................... 96-00-00 38796-210 FUEL LOW Annunciator Circuit Operational Check..... 96-00-00 38796-211 FUEL LOW Annunciator Circuit Component

Replacement..................................................................... 96-00-00 39396-212 FADEC FAIL Annunciator and Fail Horn/Audio Alert Circuit

Operation ............................................................................. 96-00-00 39396-213 FADEC FAIL Annunciator and Fail Horn Circuit

Operational Check........................................................ 96-00-00 39996-214 FADEC FAIL Annunciator and Fail Horn Circuit

Functional Check.......................................................... 96-00-00 39996-215 FADEC FAIL Annunciator Circuit, ECU Fail Relay

(1K5) Removal ............................................................. 96-00-00 40096-216 FADEC FAIL Annunciator Circuit, ECU Fail Relay

(1K5) Installation .......................................................... 96-00-00 40696-217 FADEC FAIL Annunciator Circuit Component

Replacement..................................................................... 96-00-00 40696-218 FADEC DEGRADED Annunciator Circuit Operation ........... 96-00-00 40796-219 FADEC DEGRADED Annunciator Circuit Operational

Check................................................................................ 96-00-00 40796-220 FADEC DEGRADED Annunciator Circuit Functional

Check................................................................................ 96-00-00 40796-221 FADEC DEGRADED Annunciator Circuit Component

Replacement..................................................................... 96-00-00 40996-222 FADEC MANUAL Annunciator Circuit Operation................. 96-00-00 41296-223 FADEC MANUAL Annunciator Circuit Operational

Check................................................................................ 96-00-00 41296-224 FADEC Auto/Manual Relay (1K4) Removal ................. 96-00-00 41796-225 FADEC Auto/Manual Relay (1K4) Installation.............. 96-00-00 421

BHT-407-MM-10




96-226 FADEC MANUAL Annunciator and Fail Horn Circuit Component Replacement............................................. 96-00-00 421

96-227 ENGINE CHIP Annunciator Circuit Operation...................... 96-00-00 42196-228 ENGINE CHIP Annunciator Circuit Operational

Check................................................................................ 96-00-00 42196-229 ENGINE CHIP Annunciator Circuit Functional Check.. 96-00-00 42496-230 Engine Chip Detectors 1E7 and 1E8 Removal and

Installation......................................................................... 96-00-00 42496-231 ENGINE CHIP Annunciator Circuit Component

Replacement..................................................................... 96-00-00 42796-232 Transmission Chip (XMSN CHIP) Annunciator Circuit

Operation ............................................................................. 96-00-00 42796-233 Transmission Chip (XMSN CHIP) Annunciator Circuit

Operational Check........................................................ 96-00-00 42796-234 XMSN CHIP Annunciator Circuit Functional Check ..... 96-00-00 42796-235 Transmission Chip Detectors 1E3, 1E5, and Freewheel

Chip Detector Removal and Installation ....................... 96-00-00 43196-236 Transmission Chip (XMSN CHIP) Annunciator Circuit

Component Replacement............................................. 96-00-00 43196-237 Tail Rotor Gearbox Chip (T/R CHIP) Annunciator Circuit

Operation ............................................................................. 96-00-00 43196-238 Tail Rotor Gearbox Chip (T/R CHIP) Annunciator Circuit

Operational Check........................................................ 96-00-00 43596-239 Tail Rotor Gearbox Chip (T/R CHIP) Annunciator Circuit

Functional Check.......................................................... 96-00-00 43596-240 Tail Rotor Gearbox Chip Detector (1E4) Removal

and Installation.................................................................. 96-00-00 43596-241 Tail Rotor Gearbox Chip (T/R CHIP) Annunciator

Circuit Component Replacement ................................. 96-00-00 43596-242 Generator Fail (GEN FAIL) Annunciator Circuit Operation .. 96-00-00 43896-243 Generator Fail (GEN FAIL) Annunciator Circuit

Operational Check........................................................ 96-00-00 43896-244 Generator Fail (GEN FAIL) Annunciator Circuit

Component Replacement............................................. 96-00-00 43896-245 Transmission Oil Pressure (XMSN OIL PRESS) Annunciator

Circuit Operation .................................................................. 96-00-00 44296-246 Transmission Oil Pressure (XMSN OIL PRESS)

Annunciator Circuit Operational Check ........................ 96-00-00 44296-247 Transmission Oil Pressure Switch (1S4) Removal....... 96-00-00 44696-248 Transmission Oil Pressure Switch (1S4) Functional

Check................................................................................ 96-00-00 44696-249 Transmission Oil Pressure Switch (1S4) Installation.... 96-00-00 44996-250 Transmission Oil Pressure (XMSN OIL PRESS)

Annunciator Circuit Component Replacement ............. 96-00-00 45096-251 Check Instruments (CHECK INSTR) Annunciator Circuit

Operation (S/N 53000 Through 54299)................................ 96-00-00 45096-252 Check Instruments (CHECK INSTR) Annunciator Circuit

Operational Check (S/N 53000 Through 54299).......... 96-00-00 452

BHT-407-MM-10




96-253 Check Instruments (CHECK INSTR) Annunciator Circuit Component Replacement (S/N53000 Through 54299) 96-00-00 455

96-254 BATTERY RELAY Annunciator Circuit Operation................ 96-00-00 45596-255 BATTERY RELAY Annunciator Circuit Functional

Check................................................................................ 96-00-00 45596-256 BATTERY RELAY Annunciator Circuit Component

Replacement..................................................................... 96-00-00 45796-257 Transmission Oil Temperature (XMSN OIL TEMP)

Annunciator Circuit Operation .............................................. 96-00-00 45796-258 Transmission Oil Temperature (XMSN OIL TEMP)

Annunciator Circuit Operational Check ........................ 96-00-00 46296-259 Transmission Oil Temperature Switch (1S3) Removal 96-00-00 46296-260 Transmission Oil Temperature Switch (1S3)

Functional Check.......................................................... 96-00-00 46596-261 Transmission Oil Temperature Switch (1S3)

Installation .................................................................... 96-00-00 46696-262 Transmission Oil Temperature (XMSN OIL TEMP)

Annunciator Circuit Component Replacement ............. 96-00-00 46796-263 HYDRAULIC SYSTEM Annunciator Circuit Operation ........ 96-00-00 46796-264 HYDRAULIC SYSTEM Annunciator Circuit

Operational Check........................................................ 96-00-00 46796-265 Hydraulic Pressure Switch (9S1) Removal .................. 96-00-00 47196-266 Hydraulic Pressure Switch (9S1) Functional Check..... 96-00-00 47196-267 Hydraulic Pressure Switch (9S1) Installation ............... 96-00-00 47396-268 HYDRAULIC SYSTEM Annunciator Circuit

Component Replacement............................................. 96-00-00 47496-269 BATTERY HOT Annunciator Circuit Operation.................... 96-00-00 47496-270 BATTERY HOT Annunciator Circuit Functional Check 96-00-00 47796-271 BATTERY HOT Annunciator Circuit, Battery Thermal

Switches Inspection...................................................... 96-00-00 47796-272 BATTERY HOT Annunciator Circuit Component

Replacement..................................................................... 96-00-00 47796-273 Engine Overspeed (ENGINE OVSPD) Annunciator Circuit

Operation ............................................................................. 96-00-00 48096-274 Engine Overspeed (ENGINE OVSPD) Annunciator

Circuit Operational Check ............................................ 96-00-00 48096-275 Engine Overspeed (ENGINE OVSPD) Annunciator

Circuit Functional Check .............................................. 96-00-00 48096-276 Engine Overspeed (ENGINE OVSPD) Annunciator

Circuit Component Replacement ................................. 96-00-00 48296-277 WEIGHT-ON-GEAR and CYCLIC CENTERING Annunciator

Circuit Operation .................................................................. 96-00-00 48596-278 CYCLIC CENTERING Annunciator Circuit Functional

Check................................................................................ 96-00-00 48596-279 CYCLIC CENTERING Annunciator Circuit

Troubleshooting............................................................ 96-00-00 48596-280 Weight On Gear Switch (8S5) Removal....................... 96-00-00 48896-281 Weight On Gear Switch (8S5) Installation.................... 96-00-00 488

BHT-407-MM-10




96-282 Weight On Gear Switch (8S5) Rigging......................... 96-00-00 49096-283 CYCLIC CENTERING Annunciator Circuit Component

Replacement..................................................................... 96-00-00 49296-284 ENGINE OUT Annunciator and Warning Horn Circuit

Operation ............................................................................. 96-00-00 49296-285 ENGINE OUT Annunciator and Warning Horn Circuit

Operational Check (S/N 53000 Through 54299).......... 96-00-00 49696-286 ENGINE OUT Warning Message Operational Check

(S/N 54300 and Subsequent) ........................................... 96-00-00 50396-287 ENGINE OUT Annunciator and Warning Horn Circuit,

FADEC Auto/Manual Relay (1K4), Engine Out Relay(1K2), Engine Out Horn Mute Relay (4K2) Removal(S/N 53000 Through 54299) ............................................. 96-00-00 509

96-288 Engine Out Warning Message and Audio Alert Circuit,FADEC Auto/Manual Relay (1K4) and Engine Out Relay(1K2) Removal (S/N 54300 and Subsequent).............. 96-00-00 512

96-289 ENGINE OUT Annunciator and Warning Horn Circuit,FADEC Auto/Manual Relay (1K4), Engine Out Relay(1K2), Engine Out Horn Mute Relay (4K2) Installation(S/N 53000 Through 54299) ............................................. 96-00-00 512

96-290 Engine Out Warning Message and Audio Alert Circuit,FADEC Auto/Manual Relay (1K4) and Engine Out Relay(1K2) Installation (S/N 54300 and Subsequent)........... 96-00-00 514

96-291 ENGINE OUT Annunciator and Warning Horn Circuit Component Replacement............................................. 96-00-00 514

96-292 PEDAL STOP Annunciator Circuit Operation (S/N 53000Through 54299) ........................................................................ 96-00-00 514

96-293 Pedal Stop Caution Message Circuit Operation (S/N 54300and Subsequent) ...................................................................... 96-00-00 517

96-294 PEDAL STOP Annunciator Circuit Operational Check. 96-00-00 51796-295 PEDAL STOP Annunciator Circuit Functional Check

(S/N 53000 Through 54299) ............................................. 96-00-00 51796-296 PEDAL STOP Annunciator Circuit Component

Replacement..................................................................... 96-00-00 51896-297 RPM Annunciator and Warning Horn Circuit Operation

(S/N 53000 Through 54299) ..................................................... 96-00-00 51896-298 RPM Warning Light and Audio Alert Circuit Operation

(S/N 54300 and Subsequent) ................................................... 96-00-00 51896-299 RPM Annunciator and Warning Horn Circuit

Operational Check (S/N 53000 Through 54299).......... 96-00-00 52196-300 RPM Warning Light and Audio Alert Circuit Operational

Check (S/N 54300 and Subsequent) ................................ 96-00-00 52196-301 RPM Annunciator and Warning Horn Circuit, Low RPM

Horn Mute Relay (4K1) Removal (S/N 53000Through 54299) ................................................................ 96-00-00 527

96-302 RPM Annunciator and Warning Horn Circuit, Low RotorRPM Horn Mute Relay (4K1) Installation (S/N 53000Through 54299) ................................................................ 96-00-00 531

BHT-407-MM-10




96-303 RPM Annunciator and Rotor RPM Warning Horn/AudioAlert Circuit Component Replacement ......................... 96-00-00 531

96-304 Avionics Cooling Fan (INSTR FAN) Annunciator Operation (S/N 54300 and Subsequent).............................. 96-00-00 533

96-305 Avionics Cooling Fan (INSTR FAN) Annunciator Circuit Operational Check (S/N 54300 and Subsequent) ........ 96-00-00 533

96-306 Avionics Cooling Fan Control Relay (2150K1) Removal (S/N 54300 and Subsequent)........................ 96-00-00 537

96-307 Avionics Cooling Fan Control Relay (2150K1) Installation (S/N 54300 and Subsequent)..................... 96-00-00 539

96-308 Avionics Cooling Fan Component Replacement(S/N 54300 and Subsequent) ........................................... 96-00-00 539

LIGHTING SYSTEMS

96-309 Lighting Systems............................................................................ 96-00-00 54196-310 Interior Lighting System Description .................................... 96-00-00 54196-311 Map/Utility Light (8DS7) Description .................................... 96-00-00 54196-312 Map/Utility Light Circuit Operational Check.................. 96-00-00 54196-313 Map/Utility Light (8DS7) Removal ................................ 96-00-00 54396-314 Map/Utility Light (8DS7) Installation ............................. 96-00-00 54396-315 5VDC and 28 VDC Lighting Circuit Instrument Panel,

Caution/Warning/ Advisory Panel, and Control PanelLighting (S/N 53000 Through 54299) ....................................... 96-00-00 546

96-316 5 VDC Instrument Lighting Circuit Operation(S/N 53000 Through 54299) ............................................. 96-00-00 546

96-317 28 VDC Instrument/Control Panel Lighting Circuit Operation (S/N 53000 Through 54299)........................ 96-00-00 548

96-318 Instrument and Panel Lighting System Operation(S/N 54300 and Subsequent) ........................................... 96-00-00 550

96-319 Caution/Warning/Advisory Panel Lighting and Dimming Operation (S/N 53000 Through 54299)........................ 96-00-00 553

96-320 5 VDC and 28 VDC Instrument/Control Panel LightingCircuit Operational Check (S/N 53000 Through 54299) 96-00-00 556

96-321 Instrument and Panel Lighting System OperationalCheck (S/N 54300 and Subsequent) ................................ 96-00-00 557

96-322 Caution/Warning/Advisory Panel Lighting and Dimming Operational Check (S/N 53000 Through 54299).......... 96-00-00 563

96-323 Transistor (8Q2) Removal ............................................ 96-00-00 57096-324 Transistor (8Q2) Installation ......................................... 96-00-00 57096-325 Zener Diode (8CR2) Removal (S/N 53000 Through

54299)............................................................................... 96-00-00 57496-326 Zener Diode (8CR2) Installation (S/N 53000 Through

54299)............................................................................... 96-00-00 57496-327 Light Dimming Relay (8K3) Removal ........................... 96-00-00 57696-328 Light Dimming Relay (8K3) Installation ........................ 96-00-00 576

BHT-407-MM-10




96-329 5 VDC and 28 VDC Lighting Circuits, Instrument Panel,Control Panel, Caution/Warning/Advisory Panel Component Replacement............................................. 96-00-00 579

96-330 Cabin/Passenger Lighting System Description ......................... 96-00-00 57996-331 Cabin/Passenger Lighting System Operation ...................... 96-00-00 57996-332 Cabin/Passenger Lighting System Operational

Check................................................................................ 96-00-00 57996-333 Cabin/Passenger Lighting System Component

Replacement..................................................................... 96-00-00 58296-334 Exterior Lighting Systems .............................................................. 96-00-00 58296-335 Position Lights System Operation ........................................ 96-00-00 58296-336 Position Lights System Operational Check .................. 96-00-00 58296-337 Position (Navigation) Lights Removal (S/N 53000

Through 54299) ................................................................ 96-00-00 58796-338 Forward Position Lights Removal (S/N 54300 and

Subsequent)...................................................................... 96-00-00 58796-339 Aft Position Lights Removal (S/N 54300 and

Subsequent)...................................................................... 96-00-00 59096-340 Tail Light (8DS4) Removal (S/N 53000 Through

54299)............................................................................... 96-00-00 59396-341 Tail Light (8DS4) Removal (S/N 54300 and

Subsequent)...................................................................... 96-00-00 59396-342 Position Lights Cleaning............................................... 96-00-00 59396-343 Position Lights Inspection............................................. 96-00-00 59396-344 Position (Navigation) Lights Installation (S/N 53000

Through 54299) ................................................................ 96-00-00 59596-345 Forward Position Lights Installation (S/N 54300 and

Subsequent)...................................................................... 96-00-00 59596-346 Aft Position Lights Installation (S/N 54300 and

Subsequent)...................................................................... 96-00-00 59696-347 Tail Light (8DS4) Installation (S/N 54300 and

Subsequent)...................................................................... 96-00-00 59796-348 Anti-collision (Strobe) Light System Operation (S/N 53000

Through 54299) ........................................................................ 96-00-00 59896-349 Anti-collision (Strobe) Light System Operational

Check (S/N 53000 Through 54299) .................................. 96-00-00 59896-350 Anti-collision (Strobe) Light System Troubleshooting

(S/N 53000 Through 54299) ............................................. 96-00-00 60196-351 Anti-collision Light (8DS3) Removal (S/N 53000

Through 54299) ................................................................ 96-00-00 60196-352 Anti-collision Light (8DS3) Installation (S/N 53000

Through 54299) ................................................................ 96-00-00 60196-353 Strobe Light Power Supply (8PS1) Removal (S/N 53000

Through 54299) ................................................................ 96-00-00 60396-354 Strobe Light Power Supply (8PS1) Installation

(S/N 53000 Through 54299) ............................................. 96-00-00 60396-355 Anti-collision Light System Operation (S/N 54300 and

Subsequent) ............................................................................. 96-00-00 605

BHT-407-MM-10




96-356 Anti-collision Light System Operational Check(S/N 54300 and Subsequent) ........................................... 96-00-00 605

96-357 Anti-collision Light (8DS3) Removal (S/N 54300 andSubsequent)...................................................................... 96-00-00 605

96-358 Anti-collision Light Cleaning ......................................... 96-00-00 60796-359 Anti-collision Light Inspection ....................................... 96-00-00 60796-360 Anti-collision Light Installation (S/N 54300 and

Subsequent)...................................................................... 96-00-00 60796-361 Landing Light System Operation.......................................... 96-00-00 60996-362 Landing Light System Operational Check (S/N 53000

Through 54299) ................................................................ 96-00-00 61196-363 Landing Light System Operational Check (S/N 54300

and Subsequent)............................................................... 96-00-00 61196-364 Landing Lights (8DS1/8DS2) Removal ........................ 96-00-00 61796-365 Landing Lights (8DS1/8DS2) Installation ..................... 96-00-00 61796-366 Landing Light Relays (8K1 and 8K2) Removal

(S/N 53000 Through 54299) ............................................. 96-00-00 61796-367 Landing Light Relays (8K1 and 8K2) Installation

(S/N 53000 Through 54299) ............................................. 96-00-00 61996-368 Landing Light Switch (4A1S2) Removal....................... 96-00-00 62196-369 Landing Light Switch (4A1S2) Installation.................... 96-00-00 621

ENGINE ELECTRICAL SYSTEMS

96-370 Engine Electrical System ............................................................... 96-00-00 62396-371 Engine Anti-icing Circuit Description .................................... 96-00-00 62396-372 Engine Anti-ice Circuit Operational Check ................... 96-00-00 62396-373 Engine Anti-icing Circuit Functional Check .................. 96-00-00 62596-374 Engine Anti-icing Circuit Troubleshooting .................... 96-00-00 62696-375 ENG ANTI-ICE Switch (4A2S1) Removal .................... 96-00-00 62696-376 ENG ANTI-ICE Switch (4A2S1) Installation ................. 96-00-00 62696-377 Engine Anti-icing Circuit Component Replacement ..... 96-00-00 626

FUEL DISTRIBUTION ELECTRICAL SYSTEMS

96-378 Fuel Distribution Electrical Systems............................................... 96-00-00 62996-379 Fuel Shutoff Valve Electrical System Operation .................. 96-00-00 62996-380 Fuel Shutoff Valve Electrical System, Fuel Cell Drain

Valve Circuit Operational Check .................................. 96-00-00 63296-381 Fuel Shutoff Valve (1B5) Removal and Installation...... 96-00-00 63796-382 Fuel Valve Switch (4A3S1) Removal ........................... 96-00-00 63796-383 Fuel Valve Switch (4A3S1) Installation ........................ 96-00-00 63796-384 Fuel Shutoff Valve Electrical System, Fuel Cell Drain

Valve Circuit Component Replacement ....................... 96-00-00 64096-385 Fuel Cell Drain Valve Circuit Operation ............................... 96-00-00 64096-386 Fuel Cell Drain Valves Circuit Operational Check........ 96-00-00 64096-387 Forward/Main Fuel Drain Switches (1S1) and (1S2)

Removal ....................................................................... 96-00-00 640

BHT-407-MM-10




96-388 Forward/Main Fuel Drain Switches (1S1) and (1S2) Installation .................................................................... 96-00-00 644

96-389 Fuel Drain Solenoid Valves (1L1 and 1L2) Removaland Installation.................................................................. 96-00-00 644

96-390 Right Fuel Transfer Pump/Right Fuel Boost Pump Circuit Operation ............................................................................. 96-00-00 644

96-391 Right Fuel Transfer Pump Circuit (S/N 53000 Through53174)............................................................................... 96-00-00 651

96-392 Right Fuel Transfer Pump Circuit (S/N 53175 Through54299)............................................................................... 96-00-00 651

96-393 Right Fuel Transfer Pump Circuit (S/N 54300 andSubsequent)...................................................................... 96-00-00 652

96-394 Right Fuel Boost Pump Circuit.......................................... 96-00-00 65396-395 Right Fuel Transfer Pump/Right Fuel Boost Pump Circuit

Operational Check........................................................ 96-00-00 65396-396 Right Fuel Transfer Pump Relay (1K8) Removal ......... 96-00-00 65496-397 Right Fuel Transfer Pump Relay (1K8) Installation ...... 96-00-00 65896-398 Right Fuel Transfer Pump/Right Fuel Boost Pump

Circuit Component Replacement ................................. 96-00-00 66096-399 Left Fuel Transfer Pump/Left Boost Pump Circuit Operation 96-00-00 66096-400 Left Fuel Transfer Pump Circuit (S/N 53000 Through

53174)............................................................................... 96-00-00 66096-401 Left Fuel Transfer Pump Circuit (S/N 53175 Through

54299)............................................................................... 96-00-00 66796-402 Left Fuel Transfer Pump Circuit (S/N 54300 and

Subsequent)...................................................................... 96-00-00 66896-403 Left Fuel Boost Pump Circuit ............................................ 96-00-00 66896-404 Left Fuel Transfer Pump/Left Fuel Boost Pump Circuit

Operational Check........................................................ 96-00-00 66996-405 Left Fuel Transfer Pump Relay (1K7) Removal ........... 96-00-00 67196-406 Left Fuel Transfer Pump Relay (1K7) Installation ........ 96-00-00 67696-407 Left Fuel Transfer Pump/Left Fuel Boost Pump Circuit

Component Replacement............................................. 96-00-00 676

HYDRAULIC ELECTRICAL CONTROL SYSTEM

96-408 Hydraulic Electrical Control System............................................... 96-00-00 67796-409 Hydraulic Electrical Control System Operational

Check................................................................................ 96-00-00 67796-410 Off Hyd Sys Switch (4A2S2) Removal ......................... 96-00-00 68396-411 Off Hyd Sys Switch (4A2S2) Installation ...................... 96-00-00 68396-412 Hydraulic Bypass Solenoid (9L1) Replacement ........... 96-00-00 683

FLIGHT CONTROL ELECTRICAL SYSTEM

96-413 Airspeed Actuated Tail Rotor Pedal Restrictor Control System Operation (S/N 53000 Through 54299)................................ 96-00-00 685

BHT-407-MM-10




96-414 Airspeed Actuated Tail Rotor Pedal Restrictor Control System Operation (S/N 54300 and Subsequent).............................. 96-00-00 685

96-415 Airspeed Actuated Tail Rotor Pedal Restrictor ControlSystem Operational Check (S/N 53000 Through54299)............................................................................... 96-00-00 688

96-416 Airspeed Actuated Tail Rotor Pedal Restrictor ControlSystem Operational Check (S/N 54300 andSubsequent)...................................................................... 96-00-00 688

96-417 Airspeed Actuated Tail Rotor Pedal Restrictor ControlSystem Functional Check (S/N 53000 Through54299)............................................................................... 96-00-00 696

96-418 Airspeed Actuated Tail Rotor Pedal Restrictor ControlSystem Functional Check (S/N 54300 andSubsequent)...................................................................... 96-00-00 702

96-419 Pedal Restrictor Control Unit (PRCU) (6540CM1) Removal (S/N 53000 Through 54299) ......................... 96-00-00 703

96-420 Pedal Restrictor Control Unit (PRCU) (6540CM1) Inspection (S/N 53000 Through 54299) ....................... 96-00-00 703

96-421 Pedal Restrictor Control Unit (PRCU) (6540CM1) Installation (S/N 53000 Through 54299) ...................... 96-00-00 705

96-422 Pedal Stop Switch (6540DS1) Removal (S/N 53000Through 54299) ................................................................ 96-00-00 705

96-423 Pedal Stop Switch (6540DS1) Installation (S/N 53000Through 54299) ................................................................ 96-00-00 705

96-424 Pedal Stop Switch (6540DS1) Lamp Replacement(S/N 53000 Through 54299) ............................................. 96-00-00 707

96-425 Airspeed Actuated Tail Rotor Pedal Restrictor ControlElectrical System Component Replacement ................ 96-00-00 707

96-426 Pedal Restrictor Control System Relay (6540K1) Removal (S/N 54300 and Subsequent)........................ 96-00-00 707

96-427 Pedal Restrictor Control System Relay (6540K1) Installation (S/N 54300 and Subsequent)..................... 96-00-00 709

96-428 Miscellaneous Electrical System.................................................... 96-00-00 71196-429 Particle Separator Electrical System Operation ................... 96-00-00 71196-430 Particle Separator Electrical System Operational

Check................................................................................ 96-00-00 71196-431 Auxiliary 28 VDC Power Connector.......................................... 96-00-00 71596-432 Windshield Defogging Blower System...................................... 96-00-00 71596-433 Windshield Defogging Blower System Operational

Check................................................................................ 96-00-00 71596-434 Windshield Defogging Blower System

Troubleshooting............................................................ 96-00-00 71596-435 Windshield Defog Blowers (10B1 and 10B2)

Replacement ................................................................ 96-00-00 71896-436 Air Conditioning Electrical System (AIR COMM STC).............. 96-00-00 71896-437 Cabin Heater Electrical System (AIR COMM STC) .................. 96-00-00 71896-438 Tail Rotor Camera (9700A1) (S/N 54300 and Subsequent) ..... 96-00-00 718

BHT-407-MM-10




96-439 Tail Rotor Camera (9700A1) Operation (S/N 54300 andSubsequent) ............................................................................. 96-00-00 718

96-440 Tail Rotor Camera (9700A1) Operational Check(S/N 54300 and Subsequent) ........................................... 96-00-00 718

96-441 Tail Rotor Camera (9700A1) Removal (S/N 54300and Subsequent)............................................................... 96-00-00 721

96-442 Tail Rotor Camera (9700A1) Cleaning (S/N 54300and Subsequent)............................................................... 96-00-00 721

96-443 Tail Rotor Camera (9700A1) Inspection (S/N 54300and Subsequent)............................................................... 96-00-00 721

96-444 Tail Rotor Camera (9700A1) Installation (S/N 54300and Subsequent)............................................................... 96-00-00 723

96-445 Tail Rotor Camera Transistor (9700Q1) Removal........ 96-00-00 72396-446 Tail Rotor Camera Transistor (9700Q1) Installation..... 96-00-00 72496-447 Tail Rotor Camera Relay (9700K1) Removal............... 96-00-00 72496-448 Tail Rotor Camera Relay (9700K1) Installation............ 96-00-00 726

FIGURES

Figure Page Number Title Number

96-1 Standard Tools ................................................................................................... 3496-2 Standard Diode Symbols................................................................................ 4196-3 Standard Diode Functional Check.................................................................. 4296-4 Zener Diode Functional Check....................................................................... 4396-5 Transient Suppression Diode Assemblies Functional Check......................... 4596-6 Transistor (NPN) Functional Check................................................................ 4696-7 Electrical Components and Assemblies Reference Designator Description .. 5996-8 Electrical and Electronic Components Location ............................................. 11696-9 Electrical Wires Identification Code Description............................................. 16496-10 Circuit Identification Example ......................................................................... 16596-11 DC Power System Simplified Schematic........................................................ 16896-12 Battery System Simplified Schematic............................................................. 17196-13 Battery System Trouble No. 1 ........................................................................ 17396-14 Battery System Trouble No. 2 ........................................................................ 17596-15 17 Amp/Hour Battery Removal and Installation ............................................. 17696-16 28 Amp/Hour Battery Removal and Installation ............................................. 17896-17 Battery Relay (2K1) Removal and Installation................................................ 18396-18 External DC Power System Simplified Schematic ......................................... 18596-19 External DC Power Trouble No. 1 .................................................................. 18796-20 External Power Relay (2K2) Removal and Installation................................... 18996-21 Start Switch (4A1S3) Contact Arm Positions ................................................. 19196-22 Start and Ignition System Simplified Schematic............................................. 19296-23 Start and Ignition System Trouble No. 1 ........................................................ 20396-24 Start and Ignition System Trouble No. 2 ........................................................ 20496-25 Start and Ignition System Trouble No. 3 ........................................................ 205

BHT-407-MM-10


FIGURES (CONT)


96-26 Start and Ignition System Trouble No. 4 ........................................................ 20796-27 Start and Ignition System Trouble No. 5 ........................................................ 20896-28 Start and Ignition System Trouble No. 6 ........................................................ 20996-29 Ignition System Trouble No. 1 ........................................................................ 21196-30 Engine Out Relay (1K2) and FADEC/Start Relay (1K3) Removal

and Installation.................................................................................................... 21496-31 Ignitor Relay (2K4) Removal and Installation ................................................. 21696-32 Starter Relay (1K1) Removal and Installation ................................................ 21896-33 FADEC Mode Switch (1S18) .............................................................................. 22096-34 FADEC Mode Switch Lamps (S/N 53000 Through 54299) Removal

and Installation.................................................................................................... 22696-35 Voltage Regulator (2VR1) Simplified Schematic............................................ 22896-36 Starter Generator (2MG1) Simplified Schematic............................................ 23196-37 Generator System Simplified Schematic........................................................ 23396-38 Generator System Trouble No. 1 ................................................................... 23696-39 Generator System Trouble No. 2 ................................................................... 23796-40 Generator System Trouble No. 3 ................................................................... 23896-41 Generator System Trouble No. 4 ................................................................... 23996-42 Generator System Trouble No. 5 ................................................................... 24096-43 Voltage Regulator (2VR1) Adjustment ........................................................... 24196-44 Wear Limits of the Starter Generator Brushes Inspection.............................. 24496-45 Seating of the Starter Generator Brushes Inspection..................................... 24596-46 Correct Position of the Starter Generator Brushes and Springs Inspection ... 24696-47 Voltage Regulator (2VR1) Removal and Installation...................................... 24796-48 Generator Relay (2K3) Removal and Installation........................................... 24996-49 Caution/Warning/Advisory Panel Quick Reference Table (S/N 53000

Through 54299) .................................................................................................. 25296-50 Caution/Warning/Advisory Panel Annunciators Internal Simplified

Schematic (S/N 53000 Through 54299) ............................................................. 25496-51 Crew Alerting System (CAS) Messages PFD and MFD Displays

(S/N 54300 and Subsequent) ............................................................................. 25696-52 Crew Alerting System (CAS) Messages Quick Reference Table

(S/N 54300 and Subsequent) ............................................................................. 25796-53 Crew Alerting System (CAS) Message/Airframe Discrete Input and Audio

Alert Reference Diagram (S/N 54300 and Subsequent)..................................... 25896-54 Master Warning/Caution PBS Simplified Schematic (S/N 54300 and

Subsequent)........................................................................................................ 26196-55 Master Warning/Caution PBA System Trouble No. 1 (S/N 54300 and

Subsequent)........................................................................................................ 26396-56 Master Warning/Caution PBA System Trouble No. 2 (S/N 54300 and

Subsequent)........................................................................................................ 26496-57 Master Warning/Caution PBS System Trouble No. 3 (S/N 54300 and

Subsequent)........................................................................................................ 26596-58 Caution/Warning/Advisory Panel Lamps Removal and Installation

(S/N 53000 Through 54299) ............................................................................... 26896-59 Annunciator Lens Replacement (S/N 53000 Through 54299) ....................... 27096-60 Caution/Warning/Advisory Panel (4DS1) Removal and Installation

(S/N 53000 Through 54299) ............................................................................... 27296-61 FLOAT ARM and FLOAT TEST Annunciators Circuit Simplified Schematic . 273

BHT-407-MM-10


FIGURES (CONT)


96-62 FLOAT TEST Annunciator Circuit Trouble No. 1 ........................................... 27696-63 FLOAT TEST Annunciator Circuit Trouble No. 2 ........................................... 27796-64 FLOAT ARM Annunciator Circuit Trouble No. 1............................................. 28096-65 FLOAT ARM Annunciator Circuit Trouble No. 2............................................. 28296-66 ENGINE FIRE Annunciator Circuit Simplified Schematic............................... 28496-67 ENGINE FIRE Annunciator Circuit Trouble No. 1 .......................................... 28696-68 ENGINE ANTI-ICE Annunciator Circuit Simplified Schematic ....................... 28896-69 ENGINE ANTI-ICE Annunciator Circuit Trouble No. 1 ................................... 28996-70 ENGINE ANTI-ICE Annunciator Circuit Trouble No. 2 ................................... 29196-71 Engine Anti-ice Pressure Switch (1S50) Removal and Installation ................ 29296-72 AUTO RELIGHT Annunciator Circuit Simplified Schematic ........................... 29496-73 AUTO RELIGHT Annunciator Circuit Trouble No. 1....................................... 29696-74 AUTO RELIGHT Annunciator Circuit Trouble No. 2....................................... 29796-75 START Annunciator Circuit Simplified Schematic.......................................... 29996-76 START Annunciator Circuit Trouble No. 1 ..................................................... 30096-77 START Annunciator Circuit Trouble No. 2 ..................................................... 30296-78 BAGGAGE DOOR Annunciator Circuit Simplified Schematic........................ 30396-79 BAGGAGE DOOR Annunciator Circuit Trouble No. 1 ................................... 30496-80 BAGGAGE DOOR Annunciator Circuit Trouble No. 2 ................................... 30596-81 Baggage Door Switch (4S6) Maintenance Practices ..................................... 30796-82 LITTER DOOR Annunciator Circuit Simplified Schematic ............................. 30896-83 LITTER DOOR Annunciator Circuit Trouble No. 1 ......................................... 30996-84 LITTER DOOR Annunciator Circuit Trouble No. 2 ......................................... 31196-85 HEATER OVERTEMP Annunciator Circuit Simplified Schematic.................. 31296-86 L/FUEL BOOST Annunciator Circuit Simplified Schematic............................ 31496-87 L/FUEL BOOST Annunciator Circuit Trouble No. 1 ....................................... 31596-88 L/FUEL BOOST Annunciator Circuit Trouble No. 2 ....................................... 31696-89 Left Boost Pump Fuel Pressure Switch (1S22) Removal and Installation...... 31996-90 Left and Right Fuel Transfer Pump (L/FUEL XFR, R/FUEL XFR)

Annunciators Simplified Schematic (S/N 53000 Through 53174Pre TB 407-08-85) .............................................................................................. 322

96-91 Left and Right Fuel Transfer Pump (L/FUEL XFR, R/FUEL XFR) Annunciators Simplified Schematic (S/N 53000 Through 53174 Post TB 407-08-85) ......... 323

96-92 Left and Right Fuel Transfer Pump (L/FUEL XFR, R/FUEL XFR) Annunciators Simplified Schematic (S/N 53175 Through 53799 Pre TB 407-08-85)........... 325

96-93 Left and Right Fuel Transfer Pump (L/FUEL XFR, R/FUEL XFR)Annunciators Simplified Schematic (S/N 53175 Through 53799Post TB 407-08-85 and S/N 53800 Through 54299) .......................................... 326

96-94 Left and Right Fuel Transfer Pump (L/FUEL XFR, R/FUEL XFR)Annunciators Simplified Schematic (S/N 54300 and Subsequent) ................ 328

96-95 Left and Right Fuel Transfer Pump (L/FUEL XFR, R/FUEL XFR)Annunciators Trouble No. 1 (S/N 53000 Through 53174 Pre TB 407-08-85) 331




BHT-407-MM-10


FIGURES (CONT)



96-100 Left and Right Fuel Transfer Pump (L/FUEL XFR, R/FUEL XFR)Annunciators Trouble No. 1 (S/N 53000 Through 53799 Post TB 407-08-85and S/N 53800 Through 54299) ......................................................................... 337

96-101 Left and Right Fuel Transfer Pump (L/FUEL XFR, R/FUEL XFR) Annunciators Trouble No. 2 (S/N 53000 Through 53799 Post TB 407-08-85 andS/N 53800 Through 54299) ................................................................................ 338




96-105 Left and Right Fuel Transfer Pump (L/FUEL XFR, R/FUEL XFR)Annunciators Trouble No. 1 (S/N 54300 and Subsequent) ............................ 343





96-110 Left Transfer Pump Fuel Pressure Switch (1S24) Removal andInstallation........................................................................................................... 350

96-111 Right Transfer Pump Fuel Pressure Switch (1S23) Removal andInstallation........................................................................................................... 354

96-112 FUEL FILTER Annunciator Circuit Simplified Schematic ............................... 35696-113 FUEL FILTER Annunciator Circuit Trouble No. 1........................................... 35896-114 FUEL FILTER Annunciator Circuit Trouble No. 2........................................... 35996-115 R/FUEL BOOST Annunciator Circuit Simplified Schematic ........................... 36096-116 R/FUEL BOOST Annunciator Circuit Trouble No. 1....................................... 36296-117 R/FUEL BOOST Annunciator Circuit Trouble No. 2....................................... 36396-118 Right Boost Pump Fuel Pressure Switch (1S21) Removal and Installation ... 36696-119 FUEL VALVE Annunciator Circuit Simplified Schematic................................ 36996-120 FUEL VALVE Annunciator Circuit Trouble No. 1 ........................................... 37096-121 FUEL VALVE Annunciator Circuit Trouble No. 2 ........................................... 37296-122 FUEL VALVE Annunciator Circuit Trouble No. 3 (S/N 53000 Through

54299)................................................................................................................. 37496-123 Fuel Shutoff Valve Relay (1K6) Removal and Installation (S/N 53000

Through 54299) .................................................................................................. 37696-124 FADEC FAULT Annunciator Circuit Simplified Schematic ............................. 37896-125 FADEC FAULT Annunciator Circuit Trouble No. 1......................................... 38096-126 FADEC FAULT Annunciator Circuit Trouble No. 2......................................... 382

BHT-407-MM-10


FIGURES (CONT)


96-127 RESTART FAULT Annunciator Circuit Simplified Schematic ........................ 38396-128 RESTART FAULT Annunciator Circuit Trouble No. 1 .................................... 38596-129 RESTART FAULT Annunciator Circuit Trouble No. 2 .................................... 38696-130 FUEL LOW Annunciator Circuit Simplified Schematic ................................... 38896-131 FUEL LOW Annunciator Circuit Trouble No. 1............................................... 39096-132 FUEL LOW Annunciator Circuit Trouble No. 2............................................... 39196-133 FUEL LOW Annunciator Circuit Trouble No. 3............................................... 39296-134 FUEL LOW Annunciator Circuit Trouble No. 4............................................... 39496-135 FADEC FAIL Annunciator and Fail Horn Circuit Simplified Schematic

(S/N 53000 Through 53015) ............................................................................... 39596-136 FADEC FAIL Annunciator and Fail Horn Circuit Simplified Schematic

(S/N 53016 Through 54299) ............................................................................... 39696-137 FADEC FAIL Annunciator and Audio Mute Circuit Simplified Schematic

(S/N 54300 and Subsequent) ............................................................................. 39896-138 FADEC FAIL Annunciator and Fail Horn Circuit Trouble No. 1...................... 40196-139 FADEC FAIL Annunciator and Fail Horn Circuit Trouble No. 2...................... 40296-140 FADEC FAIL Annunciator and Fail Horn Circuit Trouble No. 3...................... 40396-141 ECU Fail Relay (1K5) Removal and Installation............................................. 40496-142 FADEC DEGRADED Annunciator Circuit Simplified Schematic .................... 40896-143 FADEC DEGRADED Annunciator Circuit Trouble No. 1................................ 41096-144 FADEC DEGRADED Annunciator Circuit Trouble No. 2................................ 41196-145 FADEC MANUAL Annunciator Circuit Simplified Schematic ......................... 41396-146 FADEC MANUAL Annunciator Circuit Trouble No. 1 ..................................... 41596-147 FADEC MANUAL Annunciator Circuit Trouble No. 2 ..................................... 41896-148 FADEC Auto/Manual Relay (1K4) Removal and Installation.......................... 41996-149 ENGINE CHIP Annunciator Circuit Simplified Schematic .............................. 42296-150 ENGINE CHIP Annunciator Circuit Trouble No. 1.......................................... 42596-151 ENGINE CHIP Annunciator Circuit Trouble No. 2.......................................... 42696-152 Transmission Chip (XMSN CHIP) Annunciator Circuit Simplified

Schematic ........................................................................................................... 42896-153 XMSN CHIP Annunciator Circuit Trouble No. 1 ............................................. 43096-154 XMSN CHIP Annunciator Circuit Trouble No. 2 ............................................. 43296-155 T/R CHIP Annunciator Circuit Simplified Schematic ...................................... 43396-156 Tail Rotor Gearbox Chip (T/R CHIP) Annunciator Circuit Trouble No. 1........ 43696-157 Tail Rotor Gearbox Chip (T/R CHIP) Annunciator Circuit Trouble No. 2........ 43796-158 Generator Fail (GEN FAIL) Annunciator Circuit Simplified Schematic........... 43996-159 Generator Fail (GEN FAIL) Annunciator Circuit Trouble No. 1 ...................... 44096-160 Generator Fail (GEN FAIL) Annunciator Circuit Trouble No. 2 ...................... 44196-161 Transmission Oil Pressure (XMSN OIL PRESS) Annunciator Circuit

Simplified Schematic ...................................................................................... 44396-162 Transmission Oil Pressure (XMSN OIL PRESS) Annunciator Circuit

Trouble No. 1.................................................................................................. 44496-163 Transmission Oil Pressure (XMSN OIL PRESS) Annunciator Circuit

Trouble No. 2.................................................................................................. 44596-164 Transmission Oil Pressure (XMSN OIL PRESS) Annunciator Circuit

Trouble No. 3.................................................................................................. 44796-165 Transmission Oil Pressure Switch (1S4) Removal and Installation ............... 448

BHT-407-MM-10


FIGURES (CONT)


96-166 Check Instruments (CHECK INSTR) Annunciator Circuit SimplifiedSchematic (S/N 53000 Through 54299) ............................................................. 451

96-167 Check Instruments (CHECK INSTR) Annunciator Circuit Trouble No. 1(S/N 53000 Through 54299) ............................................................................... 453

96-168 Check Instruments (CHECK INSTR) Annunciator Circuit Trouble No. 2(S/N 53000 Through 54299) ............................................................................... 454

96-169 BATTERY RELAY Annunciator Circuit Simplified Schematic ........................ 45696-170 BATTERY RELAY Annunciator Circuit Trouble No. 1.................................... 45896-171 BATTERY RELAY Annunciator Circuit Trouble No. 2.................................... 45996-172 BATTERY RELAY Annunciator Circuit Trouble No. 3.................................... 46096-173 Transmission Oil Temperature (XMSN OIL TEMP) Annunciator Circuit

Simplified Schematic ...................................................................................... 46196-174 Transmission Oil Temperature (XMSN OIL TEMP) Annunciator Circuit

Trouble No. 1.................................................................................................. 46396-175 Transmission Oil Temperature Switch (1S3) Removal and Installation ......... 46496-176 HYDRAULIC SYSTEM Annunciator Circuit Simplified Schematic ................. 46896-177 HYDRAULIC SYSTEM Annunciator Circuit Trouble No. 1............................. 46996-178 HYDRAULIC SYSTEM Annunciator Circuit Trouble No. 2............................. 47096-179 Hydraulic Pressure Switch (9S1) Removal and Installation ........................... 47296-180 BATTERY HOT Annunciator Circuit Simplified Schematic ............................ 47596-181 BATTERY HOT Annunciator Circuit Trouble No. 1 ........................................ 47896-182 BATTERY HOT Annunciator Circuit Trouble No. 2 ........................................ 47996-183 Engine Overspeed (ENGINE OVSPD) Annunciator Circuit Simplified

Schematic ........................................................................................................... 48196-184 Engine Overspeed (ENGINE OVSPD) Annunciator Circuit Trouble No. 1..... 48396-185 Engine Overspeed (ENGINE OVSPD) Annunciator Circuit Trouble No. 2..... 48496-186 CYCLIC CENTERING Annunciator Circuit Simplified Schematic

(S/N 53000 Through 54299) .............................................................................. 48696-187 WEIGHT-ON-GEAR and CYCLIC CENTERING Annunciator Circuit

Simplified Schematic (S/N 54300 and Subsequent) ...................................... 48796-188 Weight On Gear Switch (8S5) Maintenance Practices................................... 48996-189 ENGINE OUT Annunciator and Warning Horn Circuit Simplified Schematic

(S/N 53000 Through 54299) ............................................................................... 49396-190 ENGINE OUT CAS Message Simplified Schematic (S/N 54300 and

Subsequent)........................................................................................................ 49496-191 ENGINE OUT Annunciator and Warning Horn Circuit Trouble No. 1

(S/N 53000 Through 54299) ............................................................................... 49796-192 ENGINE OUT Annunciator and Warning Horn Circuit Trouble No. 2





(S/N 53000 Through 54299) ............................................................................... 502

BHT-407-MM-10


FIGURES (CONT)


96-197 ENGINE OUT Annunciator and Warning Horn Circuit Trouble No. 7(S/N 53000 Through 54299) ............................................................................... 504

96-198 Engine Out Warning Message and Audio Alert Circuit Trouble No. 1(S/N 54300 and Subsequent) ............................................................................. 505





96-203 Engine Out Relay (1K2) and Engine Out Horn Mute Relay (4K2) Removal and Installation (S/N 53000 Through 54299) .................................. 511

96-204 Engine Out Relay (1K2) and FADEC Auto/Manual Relay (1K4) Removaland Installation (S/N 54300 and Subsequent) .................................................... 513

96-205 PEDAL STOP Annunciator Circuit Simplified Schematic (S/N 53000Through 54299) .................................................................................................. 515

96-206 PEDAL STOP Annunciator Circuit Simplified Schematic (S/N 54300and Subsequent)................................................................................................. 516

96-207 RPM Annunciator and Warning Horn Circuit Simplified Schematic(S/N 53000 Through 54299) ............................................................................... 519

96-208 RPM Warning Light and Audio Alert Circuit Simplified Schematic(S/N 54300 and Subsequent) ............................................................................. 520

96-209 RPM Annunciator and Warning Horn Circuit Trouble No. 1 (S/N 53000Through 54299) .................................................................................................. 522



96-212 Low Rotor Annunciator and Warning Horn Circuit Trouble No. 4(S/N 53000 Through 54299) ............................................................................... 525


96-214 RPM Warning Light and Audio Alert Circuit Trouble No. 1 (S/N 54300and Subsequent)................................................................................................. 528



96-217 Low Rotor RPM Horn Mute Relay (4K1) Removal and Installation(S/N 53000 Through 54299) ............................................................................... 532

96-218 Avionics Cooling Fan (INSTR FAN) Simplified Schematic............................. 53496-219 Avionics Cooling Fan (INSTR FAN) Trouble No. 1 ........................................ 53596-220 Avionics Cooling Fan (INSTR FAN) Trouble No. 2 ........................................ 53696-221 Avionics Cooling Fan Control Relay (2150K1) Removal and Installation

(S/N 54300 and Subsequent) ............................................................................. 53896-222 Map/Utility Light Circuit Simplified Schematic ................................................ 54296-223 Map/Utility Light Circuit Trouble No. 1............................................................ 544

BHT-407-MM-10


FIGURES (CONT)


96-224 Map/Utility Light Circuit Removal and Installation .......................................... 54596-225 5 VDC Instrument Lighting Circuit Simplified Schematic (S/N 53000

Through 54299) .................................................................................................. 54796-226 28 VDC Instrument/Control Panel Lighting Circuit Simplified Schematic

(S/N 53000 Through 54299) ............................................................................... 54996-227 Instrument and Panel Lighting System Simplified Schematic (S/N 54300

and Subsequent)................................................................................................. 55196-228 Caution/Warning/Advisory Panel Lighting and Dimming Simplified

Schematic (S/N 53000 Through 54299) ............................................................. 55496-229 5 VDC and 28 VDC Instrument/Contro

407-MM-CH96

Documents

Transcript of 407-MM-CH96