74-21-01
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
(2)  
AMM 71-11-06/201, Core Cowl Panel

 (3)  
74-00-00/501, Ignition

 (4)  
74-21-01/601, Exciter-to-Igniter Plug Cable

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

 D. 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

 E. Procedure
 S 434-014-N00
 (1)  
Remove the caps from the cable (3) and from the output connection on the ignition exciter.

 S 214-016-N00

 (2)
Examine the exciter-to-igniter plug cable (3) (AMM 74-21-01/601).

 (a)  If it is necessary, clean the exciter-to-igniter plug cable (AMM 74-21-01/701).
 S 214-015-N00
 (3)  Examine the high tension contacts, sleeves (11), and rubber bushings (12), while they are assembled, for signs of arcs or flashover (AMM 74-21-01/601).
 NOTE: The signs of arcs are discoloration and concentrations of
____ corrosion at a point. The signs of flashover are carbon tracking marks.
 (a)  If you find signs of arcs or flashover, do the steps that follow: 1) Remove and discard the retaining ring (10). 2) Remove the sleeve (11) and the rubber bushing (12) from the
 cable.
 a) Discard the rubber bushing (12).

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
WARNING: DO NOT GET TRICHLOROTRIFLUOROETHANE IN YOUR MOUTH OR
_______ EYES OR ON YOUR SKIN. DO NOT BREATHE THE FUMES FROM TRICHLOROTRIFLUOROETHANE. PUT ON A PROTECTIVE SPLASH GOGGLE AND GLOVES WHEN YOU USE TRICHLORO-TRIFLUOROETHANE. KEEP TRICHLOROTRIFLUOROETHANE AWAY FROM SPARKS, FLAME, AND HEAT. TRICHLORO-TRIFLUOROETHANE IS A POISONOUS AND FLAMMABLE SOLVENT WHICH CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
 3) Use the solvent and the lint-free cloth to clean the new rubber bushing (12). 4) Move the rubber bushing (12) on the high tension cable.
 NOTE: Make sure there is no grease on the external surface
____ of the insulator or on the plug assembly.
 5) Move the clean sleeve (11) on the rubber bushing (12) which is on the high tension cable. 6) Install a new retaining ring (10) on the cable.
 S 114-014-N00
 (4)  If the cable is not a new cable, install new grommets (13) on each end of the cable.
 NOTE: If the grommet is not on the ends of the cable, you must
____
 install a new grommet.

 WARNING: DO NOT GET TRICHLOROTRIFLUOROETHANE IN YOUR MOUTH OR EYES
_______ OR ON YOUR SKIN. DO NOT BREATHE THE FUMES FROM TRICHLOROTRIFLUOROETHANE. PUT ON A PROTECTIVE SPLASH GOGGLE AND GLOVES WHEN YOU USE TRICHLOROTRIFLUOROETHANE. KEEP TRICHLOROTRIFLUOROETHANE AWAY FROM SPARKS, FLAME, AND HEAT. TRICHLOROTRIFLUOROETHANE IS A POISONOUS AND FLAMMABLE SOLVENT WHICH CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
 (a)  
Clean the grommet (13) with a clean, lint-free cotton cloth that you made moist with trichlorotrifluoroethane solvent.

 (b)  
Put the grommet (13) on the cable (3).

 S 434-018-N00
 (5)  Put the hose clamps (2 and 6) on the cable (3):
 (a)  
Put a hose clamp (2) on the cable (3) at the igniter plug end.

 (b)  
Put a hose clamp (2) on the cable (3) at the ignition exciter end.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
　
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