Removal of the Lower Fairing Firewall Seals

TASK 54-57-22-000-004-A
Removal of the Lower Fairing Firewall Seals

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: MAKE SURE THAT THE SAFETY DEVICES AND THE WARNING NOTICES ARE IN POSITION BEFORE YOU START A TASK ON OR NEAR:

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

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

ZONE: 410
ZONE: 420

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	AR	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
410	ENG 1 PYLON BOX AND FORWARD FAIRING
420	ENG 2 PYLON BOX AND FORWARD FAIRING
FOR [1000EM1] (ENGINE-1)
437AL, 438AR, 451AL, 452AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR, 461AL, 462AR

C. Referenced Information

REFERENCE	DESIGNATION
TASK 71-00-20-000-040-A	Removal of the Power Plant
TASK 71-00-20-000-040-A-01	Removal of the Power Plant with the Engine Positioner TWW 75E (MIAG)
TASK 71-13-11-000-010-A	Removal of the Left Fan Cowl 437AL(447AL).
TASK 71-13-16-000-010-B	Removal of the Right Fan Cowl (438AR, 448AR)
TASK 78-11-11-000-010-A	Removal of the Common Nozzle Assembly
TASK 78-32-01-000-010-A	Removal of the Left Thrust Reverser Half - Eng No. 1
TASK 78-32-02-000-010-A	Removal of the Left Thrust Reverser Half - Eng No. 2
TASK 78-32-03-000-010-A	Removal of the Right Thrust Reverser Half - Eng No. 1
TASK 78-32-04-000-010-A	Removal of the Right Thrust Reverser Half - Eng. No. 2
Lower Fairing - Firewall Seal

3. Job Set-up
Subtask 54-57-22-941-063-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) On the center pedestal, on the ENG panel 115VU:
(a) Put a WARNING NOTICE(S) to tell persons not to start the engine.
(2) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(3) On the ENG section of the maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) to tell persons not to energize the FADEC 1(2).

Subtask 54-57-22-010-056-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Put the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position:
(a) For the left pylon, in zone 410
(b) For the right pylon, in zone 420.

Subtask 54-57-22-020-055-A ** ON A/C NOT FOR ALL

C. Removal of the Components
(1) Remove the fan cowls (Ref. AMM TASK 71-13-11-000-010), (Ref. AMM TASK 71-13-16-000-010):
(a) FOR [1000EM1] (ENGINE-1)
437AL, 438AR.
(b) FOR [1000EM2] (ENGINE-2)
447AL, 448AR.
(2) Remove the left and right thrust-reverser halves (Ref. AMM TASK 78-32-01-000-010), (Ref. AMM TASK 78-32-02-000-010), (Ref. AMM TASK 78-32-03-000-010) and (Ref. AMM TASK 78-32-04-000-010):
(a) FOR [1000EM1] (ENGINE-1)
451AL, 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL, 462AR
(3) Remove the common nozzle assembly (Ref. AMM TASK 78-11-11-000-010).
(4) Remove the applicable engine (Ref. AMM TASK 71-00-20-000-040).

4. Procedure
Subtask 54-57-22-020-056-A ** ON A/C NOT FOR ALL

A. Removal of the Firewall Seals
(1) Compress and remove the firewall seal(s) (1) and/or (3) from its(their) retainer(s) (2) and/or (4).
(2) Discard the damaged firewall seal(s) (1) and/or (3).

[Rev.10 from 2021] 2026.04.01 12:51:11 UTC