Removal of the Pylon Power Feeder-Cables

TASK 24-92-00-000-802-A
Removal of the Pylon Power Feeder-Cables

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE AFTER SHUTDOWN. THE ENGINE CAN STAY HOT FOR A LONG TIME. IF YOU DO NOT OBEY THIS INSTRUCTION, INJURY CAN OCCUR.

ZONE: 413
ZONE: 414
ZONE: 423
ZONE: 424
ZONE: 451
ZONE: 461

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 1M(3 FT)
No specific	1	ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE
No specific	AR	COVER - PROTECTION

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
413	UPPER FWD PYLON
414	UPPER FWD PYLON
423	UPPER FWD PYLON
424	UPPER FWD PYLON
451	THRUST REVERSER
461	THRUST REVERSER
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
413BT, 437AL, 438AR, 451AL
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
423BT, 447AL, 448AR, 461AL

C. Referenced Information

REFERENCE	DESIGNATION
TASK 54-52-11-000-805-A	Removal of the Access Skin Panels
TASK 71-00-00-860-833-A	Procedure to Prevent Engine Motoring
TASK 71-13-00-010-802-A	Opening of the Fan Cowl Doors
TASK 78-30-00-040-805-A	Deactivation of the Thrust Reverser System for Ground Maintenance
TASK 78-36-00-010-802-A	Opening of the Thrust Reverser Cowl-Doors
Pylon Power Feeder-Cables

3. Job Set-up
Subtask 24-92-00-941-068-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) Do the procedure to prevent engine motoring
(Ref. AMM TASK 71-00-00-860-833).

Subtask 24-92-00-010-178-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Put the ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE in position on the right side of the engine.
(2) Remove the access panel (Ref. AMM TASK 54-52-11-000-805):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
413BT
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
423BT
(3) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL 448AR

Subtask 24-92-00-040-053-A ** ON A/C NOT FOR ALL

C. Deactivation of the Thrust Reverser System for Ground Maintenance

WARNING: YOU MUST DEACTIVATE THE THRUST REVERSER BEFORE YOU DO WORK ON OR AROUND IT. IF YOU DO NOT, THE THRUST REVERSER CAN OPERATE ACCIDENTALLY AND CAUSE AN INJURY AND/OR DAMAGE.

(1) Do the deactivation of the thrust reverser system for ground maintenance (Ref. AMM TASK 78-30-00-040-805).

Subtask 24-92-00-010-179-A ** ON A/C NOT FOR ALL

D. Get Access
(1) Open the left thrust-reverser cowl-door (Ref. AMM TASK 78-36-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL
(2) Put an ACCESS PLATFORM 1M(3 FT) in position.
(3) Installation of the engine protection covers

CAUTION: INSTALL PROTECTION COVERS ON ALL THE OPENINGS IMMEDIATELY TO PREVENT DAMAGE TO THE ENGINE.

(a) Install all the necessary COVER - PROTECTION to prevent damage to the engine.

4. Procedure
Subtask 24-92-00-020-052-A ** ON A/C NOT FOR ALL

A. Removal of the Pylon Power Feeder-Cables
(1) Disconnect the pylon power feeder-cables (2) from the pylon interface terminal (1).
(a) Cut and remove the lockwire from the cover.

WARNING: USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.

1 Cut and remove the lockwire (7) from the cover (8).
(b) Remove the two bolts (6) and the cover (8) from the shield.
(c) Remove the four nuts (5) and locking washer (4) from the terminal block studs.
(d) Remove the four IDG power feeder-cables (3) from the terminal block studs.
(e) Remove the four pylon power feeder-cables (2) from the terminal block studs.
(f) If you install the same four pylon power feeder-cables (2):
1 Make marks on the four pylon power feeder-cables (2) (4 (white), 1 (blue), 2 (yellow) and 3 (red)) for the subsequent installation.
(g) Remove the two bolts (12) and washers (11).
(h) Remove the plate (10).
(i) Disengage the four pylon power feeder-cables (2) from the block clamp (9).
(j) Remove the block clamp (9).
(k) Remove the two bolts (19), washers (20) and nuts (24).
(l) Remove the plates (21) and (23).
(m) Disengage the four pylon power feeder-cables (2) from the block clamp (22).
(n) Remove the block clamp (22).
(o) Remove the two screws (27) and washers (26) to disengage the pylon power feeder-cables (2) from the support bracket (25).
(p) Remove the two bolts (18) and washers (17).
(q) Remove the two plates (14) and (16) from the support bracket (13).
(r) Disengage the four pylon power feeder-cables (2) from the block clamp (15).
(s) Remove the block clamp (15).
(t) Remove the two bolts (30) and washers (29) from the clip nuts.
(u) Disengage the two clamps (28) from the pylon power feeder-cables (2).
(2) Disconnect the pylon power feeder-cables (2) from the upper forward pylon-interface terminal (34).
(a) Cut and remove the lockwire from the cover.

1 Cut and remove the lockwire (37) from the cover (35).
(b) Remove the two bolts (36) and cover (35) from the shield.
(c) Remove the four nuts (38) and spring washers (39) from the terminal block studs.
(d) Remove the eight wing power feeder-cables (40) from the terminal block studs.
(e) Remove the four pylon power feeder-cables (2) from the terminal block studs.
(f) If you install the same four pylon power feeder-cables (2):
1 Make marks on the four pylon power feeder-cables (2) (4 (white), 1 (blue), 2 (yellow) and 3 (red)) for the subsequent installation.
(g) Hold the pylon power feeder-cables (2) tightly with your hands.
(h) Remove the two bolts (33) and washers (32).
(i) Disconnect the two clamps (31) from the support bracket.
(j) Disengage the two clamps (31) from the pylon power feeder-cables (2).
(k) Remove the pylon power feeder-cables (2) from the pylon.

[Rev.10 from 2021] 2026.03.31 23:25:37 UTC