(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 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 754-030-N00
 (15) Do the ignition operational (audible) test (AMM 74-00-00/501).
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EXCITER-TO-IGNITER PLUG CABLE - INSPECTION/CHECK
________________________________________________
 1.  General
_______
 A.  This task includes the task to do a visual inspection of the
 exciter-to-igniter plug cable.

 B.  Inspection of the exciter-to-igniter plug cable is necessary after a fast engine shutdown. During a fast engine shutdown, the ignition parts cannot sufficiently cool to prevent the damage. Examine the cables and the igniter plug terminal. Make sure that the high temperatures did not cause damage to the insulation for the high tension leads or the rubber bushings.
 TASK 74-21-01-206-001-N00
 2.  Exciter-to-Igniter Plug Cable Inspection (Fig. 601)
________________________________________
 A.  References
 (1)
AMM 71-11-04/201, Fan Cowl Panels

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

 (3)
AMM 74-21-01/401, Exciter-to-Igniter Plug Cable

 (4)
AMM 74-21-01/701, Exciter-to-Igniter Plug Cable

 (5)
AMM 78-31-00/201, Thrust Reverser System

 (6)
IPC 74-21-01 Fig. 5

 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
 S 016-007-N00
 (1) Open the right fan cowl panel (AMM 71-11-04/201).
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////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
IGNITER PLUG END

EXCITER-TO-IGNITER PLUG CABLE

L-A4190
Exciter-to-Igniter Plug Cable Inspection Figure 601 (Sheet 1)
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HIGH TENSION

LATE STAGEFLASHOVER DAMAGE

Exciter-to-Igniter Plug Cable Inspection
Figure 601 (Sheet 2)

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////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
　
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