DOC AIRBUS | AMM A320FRemoval of the Firewall Assembly
TASK 54-57-22-000-823-A
Removal of the Firewall Assembly
A. Fixtures, Tools, Test and Support Equipment
B. Work Zones and Access Panels
C. Referenced Information
3. Job Set-up
Subtask 54-57-22-941-106-A ** ON A/C NOT FOR ALL
Subtask 54-57-22-020-088-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 02:04:06 UTC
Removal of the Firewall Assembly
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:
1. Reason for the Job- THE FLIGHT CONTROLS
- THE FLIGHT CONTROL SURFACES
- THE LANDING GEAR AND THE RELATED DOORS
- COMPONENTS THAT MOVE.
NOTE: Two persons are necessary to do this task.
2. Job Set-up InformationA. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | AR | ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE |
| No specific | 1 | STEPLADDER 2.0 M (6.6 FT) |
| No specific | AR | WARNING NOTICE(S) |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 410 | ENG 1 PYLON BOX AND FORWARD FAIRING |
| 420 | ENG 2 PYLON BOX AND FORWARD FAIRING |
| FOR [4020KM1] | |
| 415AL, 415AR, 451AL, 452AR, 473AL, 473AR | |
| FOR [4020KM2] | |
| 425AL, 425AR, 461AL, 462AR, 483AL, 483AR | |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 54-51-21-000-001-A | Removal of the Pylon Lateral Access-Doors |
| TASK 54-56-00-000-001-A | Removal of the Lower Fairing |
| TASK 78-30-00-481-041-A | Make the Thrust Reverser Unserviceable for Maintenance |
| TASK 78-30-00-481-041-B | Make the Thrust Reverser Unserviceable for Maintenance |
| TASK 78-36-00-010-040-A | Opening of the Thrust Reverser Doors |
| TASK 78-36-00-010-040-B | Opening of the Thrust Reverser Doors |
Firewall AssemblySubtask 54-57-22-941-106-A ** ON A/C NOT FOR ALL
A. Safety Precautions
(1) On the center pedestal, on ENG panel 115VU:
(a) Make sure that the ENG/MODE selector switch is in the NORM position.
(b) Make sure that the ENG/MASTER 1(2) control switch is in the OFF position not less than five minutes before you do this procedure.
(c) Put the WARNING NOTICE(S) in position to tell persons not to operate the ENG/MODE selector switch and the ENG/MASTER 1(2) control switch.
(2) On the ENG section of maintenance panel 50VU:
(a) Make sure that the ON legend of the FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put the WARNING NOTICE(S) in position to tell persons not to energize FADEC 1(2).
Subtask 54-57-22-040-096-A ** ON A/C NOT FOR ALL (1) On the center pedestal, on ENG panel 115VU:
(a) Make sure that the ENG/MODE selector switch is in the NORM position.
(b) Make sure that the ENG/MASTER 1(2) control switch is in the OFF position not less than five minutes before you do this procedure.
(c) Put the WARNING NOTICE(S) in position to tell persons not to operate the ENG/MODE selector switch and the ENG/MASTER 1(2) control switch.
(2) On the ENG section of maintenance panel 50VU:
(a) Make sure that the ON legend of the FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put the WARNING NOTICE(S) in position to tell persons not to energize FADEC 1(2).
B. Deactivation of the Thrust Reverser
Subtask 54-57-22-010-095-A ** ON A/C NOT FOR ALL 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 applicable thrust reverser unserviceable for maintenance (Ref. AMM TASK 78-30-00-481-041). C. Get Access
(1) Remove the applicable pylon lateral access-doors (Ref. AMM TASK 54-51-21-000-001):
(a) FOR [4020KM1]
(b) FOR [4020KM2]
(2) Remove the applicable forward lower fairings (Ref. AMM TASK 54-56-00-000-001):
(a) FOR [4020KM1]
(b) FOR [4020KM2]
(3) Open the applicable thrust reverser doors (Ref. AMM TASK 78-36-00-010-040):
(a) FOR [4020KM1]
(b) FOR [4020KM2]
(4) Put the access platform and the ladder in position:
1 For the left pylon, at zone 410
2 For the right pylon, at zone 420.
4. Procedure(1) Remove the applicable pylon lateral access-doors (Ref. AMM TASK 54-51-21-000-001):
(a) FOR [4020KM1]
(b) FOR [4020KM2]
(2) Remove the applicable forward lower fairings (Ref. AMM TASK 54-56-00-000-001):
(a) FOR [4020KM1]
(b) FOR [4020KM2]
(3) Open the applicable thrust reverser doors (Ref. AMM TASK 78-36-00-010-040):
(a) FOR [4020KM1]
(b) FOR [4020KM2]
(4) Put the access platform and the ladder in position:
NOTE: One person must use the access platform to get access to the top of the pylon.
A second person must use the stepladder to get access to the area between the pylon and the engine.
(a) Put the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE and the STEPLADDER 2.0 M (6.6 FT) in position: A second person must use the stepladder to get access to the area between the pylon and the engine.
1 For the left pylon, at zone 410
2 For the right pylon, at zone 420.
Subtask 54-57-22-020-088-A ** ON A/C NOT FOR ALL
A. Removal of the Firewall Assembly
(1) Remove the seals (9) and (14).
(2) Remove the nuts (5) and (16) and the bolts (8) and (15).
(3) Remove the bolts (2) and (13) and the washers (3) and (12).
(4) Remove the nuts (4), the bolts (7) and the washers (6).
(5) Remove the nuts (11), the bolts (1) and the firewall assembly (10).
(1) Remove the seals (9) and (14).
(2) Remove the nuts (5) and (16) and the bolts (8) and (15).
(3) Remove the bolts (2) and (13) and the washers (3) and (12).
(4) Remove the nuts (4), the bolts (7) and the washers (6).
(5) Remove the nuts (11), the bolts (1) and the firewall assembly (10).
NOTE: Two persons are necessary for this step:
- One person must remove the bolts (1) through applicable pylon lateral access-doors 415AL, 425AR, 415AR or 425AL.
- The second person must remove the nuts (11) from below the pylon.