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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.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
74-21-01
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.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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