Replacement of the Fire Seals of the Pylon-to-Wing Center Fillets

TASK 54-53-11-300-801-A
Replacement of the Fire Seals of the Pylon-to-Wing Center Fillets

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.

WARNING: PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU START A TASK ON OR NEAR:

THE FLIGHT CONTROLS
THE FLIGHT CONTROL SURFACES
THE LANDING GEAR AND THE RELATED DOORS
COMPONENTS THAT MOVE.

MOVEMENT OF COMPONENTS CAN KILL OR CAUSE INJURY TO PERSONS AND/OR CAN CAUSE DAMAGE TO THE EQUIPMENT.

ZONE: 470
ZONE: 480

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

REFERENCE	QTY	DESIGNATION
No specific	AR	ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE
No specific	1	MAT - PROTECTIVE

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
470	ENGINE 1 AFT PYLON
480	ENGINE 2 AFT PYLON
413ET, 423ET, 471AL, 471BL, 471CL, 472AR, 472BR, 481AL, 481BL, 482AR, 482BR, 482CR

C. Referenced Information

REFERENCE	DESIGNATION
TASK 54-53-11-000-804-A	Removal of the Pylon-to-Wing Access Panels and Doors
TASK 54-53-11-400-804-A	Installation of the Pylon-to-Wing Access Panels and Doors
TASK 71-00-00-860-833-A	Procedure to Prevent Engine Motoring
TASK 78-30-00-040-805-A	Deactivation of the Thrust Reverser System for Ground Maintenance
TASK 78-30-00-440-805-A	Reactivation of the Thrust Reverser System after Ground Maintenance
Fire Seals of the Pylon-to-Wing Center Fillets

3. Job Set-up
Subtask 54-53-11-941-065-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 54-53-11-040-068-A ** ON A/C NOT FOR ALL

B. Deactivation of the Thrust Reverser

WARNING: MAKE SURE THAT THE THRUST REVERSER IS LOCKED. IF NOT, THE THRUST REVERSER CAN OPERATE ACCIDENTALLY AND CAUSE INJURY TO PERSONNEL AND/OR DAMAGE TO THE REVERSER.

(1) Make the thrust reverser unserviceable for maintenance (Ref. AMM TASK 78-30-00-040-805).

Subtask 54-53-11-010-063-A ** ON A/C NOT FOR ALL

C. Get Access
(1) Put an ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position:
(a) For the left pylon, in zone 470
(b) For the right pylon, in zone 480.
(2) Remove the pylon-to-wing access panels and doors (Ref. AMM TASK 54-53-11-000-804):
(a) For the left pylon: 413ET 471AL 471CL 472AR 472BR and 471BL
(b) For the right pylon: 423ET 482CR 481AL 482AR 481BL and 482BR.

4. Procedure
Subtask 54-53-11-300-050-A ** ON A/C NOT FOR ALL

A. Replacement of the Fire Seals of the Pylon-to-Wing Center Fillets

Fire Seals of the Pylon-to-Wing Center Fillets ** ON A/C NOT FOR ALL

NOTE: The procedure is the same for all pylon-to-wing access panels and doors.

(1) Put the pylon-to-wing access panel/door (2) on a MAT - PROTECTIVE.
(2) Remove the used seal (1) from the pylon-to-wing access panel/door (2).
(3) Install a new seal (1).
(4) Make sure that the seal is correctly assembled in its groove and that it has the correct orientation. To do this:
(a) Make sure that the seal marking is on the internal side of the panel.
(b) Make sure that the seal stop touches the seal retainer lip.

5. Close-up
Subtask 54-53-11-410-054-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Install the pylon-to-wing access panels and doors (Ref. AMM TASK 54-53-11-400-804):
(a) For the left pylon: 413ET 472AR 471AL 472BR 471CL and 471BL
(b) For the right pylon: 423ET 481AL 482AR 481BL 482CR and 482BR.

Subtask 54-53-11-440-062-A ** ON A/C NOT FOR ALL

B. Reactivation of the Thrust Reverser
(1) Make the thrust reverser serviceable after maintenance (Ref. AMM TASK 78-30-00-440-805).

Subtask 54-53-11-942-061-A ** ON A/C NOT FOR ALL

C. Aircraft Maintenance Configuration
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the access platform(s).
(3) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 12:49:34 UTC