(2)
AMM 71-11-06/201, Core Cowl Panel

 (3)
AMM 78-31-00/201, Thrust Reverser System

 (4)
AIPC 74-21-01 Fig. 5, AIPC 75-20-01 Fig. 1

 B.  Access
 (1)  
Location Zone 412 Engine 1 - HPC Aft Case to Diffuser/Combustor Case 4 or 5 o'clock 422 Engine 2 - HPC Aft Case to Diffuser/Combustor Case 4 or 5 o'clock 432 Engine 3 - HPC Aft Case to Diffuser/Combustor Case 4 or 5 o'clock

 442  Engine 4 - HPC Aft Case to Diffuser/Combustor Case 4 or 5 o'clock

 (2)  
Access Panel
 416 Right Thrust Reverser Half - Engine 1
 426 Right Thrust Reverser Half - Engine 2
 436 Right Thrust Reverser Half - Engine 3
 446 Right Thrust Reverser Half - Engine 4

 C.  Procedure
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
3.  UPPER EXCITER-TO-IGNITER PLUG CABLE
SEE C
UPPER IGNITION EXCITER
8.  COOLING AIR TUBE
MOUNT BRACKET (REF)
SEE B
SEE A
LOWER IGNITION EXCITER
3.  LOWER
FWD EXCITER-TO-IGNITER PLUG CABLE
3.  UPPER 8. COOLING AIR TUBE
SEE C
EXCITER-TO-IGNITER
PLUG CABLE

A
8.  COOLING AIR
TUBE

17. CABLE CLAMP
A
(2 LOCATIONS)
14. NUT (2 LOCATIONS)
16. BOLT
LOWER (2 LOCATIONS) IGNITER PLUG BOSS
A
HYDRAULIC
PUMP
(REF)

15. BRACKET
A-A
FWD
3.  LOWER EXCITER-TO-IGNITER
PLUG CABLE

B
Exciter-to-Igniter Plug Cable Installation
Figure 401 (Sheet 1)

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
1. HEAT SHIELD
9.
6. CLAMP

Exciter-to-Igniter Plug Cable Installation
Figure 401 (Sheet 2)

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
S 864-002-N00
 WARNING: MAKE SURE THAT ELECTRICAL POWER IS REMOVED FROM THE SYSTEM FOR
_______ THREE MINUTES BEFORE YOU REMOVE THE CABLE. GROUND THE CABLE TERMINALS AGAINST THE IGNITER PLUG HOUSING AFTER YOU DISCONNECT THE CABLE. MAKE SURE THAT THE IGNITION EXCITER IS FREE FROM ELECTRICAL POWER BEFORE YOU REMOVE THE CABLE. ELECTRICAL POWER TO THE IGNITION SYSTEM IS AT A VERY HIGH VOLTAGE AND CAN CAUSE BAD INJURY TO PERSONS.
 (1)  Open these circuit breakers for the applicable cable (3), and attach DO-NOT-CLOSE tags:
 (a)  For the upper cable (3),
 1) P6 Main Power Distribution Panel
 a) 6F1 IGN 1 ENG 1
 b) 6F2 IGN 1 ENG 2
 c) 6F3 IGN 1 ENG 3
 d) 6F4 IGN 1 ENG 4

 (b)  For the lower cable (3),
 1) P6 Main Power Distribution Panel
 a) 6K19 IGN 2 ENG 1
 b) 6K20 IGN 2 ENG 2
 c) 6K21 IGN 2 ENG 3
 d) 6K22 IGN 2 ENG 4

 (c)  For the upper and/or the lower cable (3),
 1) P6 Main Power Distribution Panel
 a) 6G19 STBY IGN ENG 1
 b) 6G20 STBY IGN ENG 2
 c) 6G21 STBY IGN ENG 3
 d) 6G22 STBY IGN ENG 4

 S 014-032-N00
 (2)  Open the right fan cowl panel (AMM 71-11-04/201).
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