DOC AIRBUS | AMM A320FReplacement of the Upper Seals of the Bleed-Air Precooler Exchanger
TASK 54-52-22-300-801-B
Replacement of the Upper Seals of the Bleed-Air Precooler Exchanger
Refer to the MPD TASK: 361101-01
DISCARD PRE COOLER EXCHANGER (PCE) UPPER SEAL.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Work Zones and Access Panels
C. Expendable Parts
D. Referenced Information
3. Job Set-up
Subtask 54-52-22-941-053-A
Subtask 54-52-22-300-053-A
Subtask 54-52-22-410-052-A
[Rev.10 from 2021]
2026.04.01 02:02:10 UTC
Replacement of the Upper Seals of the Bleed-Air Precooler Exchanger
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.
Refer to the MPD TASK: 361101-01
DISCARD PRE COOLER EXCHANGER (PCE) UPPER SEAL.
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) |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 410 | ENG 1 PYLON BOX AND FORWARD FAIRING |
| 420 | ENG 2 PYLON BOX AND FORWARD FAIRING |
| 413DT, 423DT |
| FIG.ITEM | DESIGNATION | IPC-CSN |
|---|---|---|
| 3 | SEALS | AIPC 54-52-81-33-050 |
| 2 | SEALS | AIPC 54-52-81-33-060 |
| 3 | SEALS | AIPC 54-52-81-34-050 |
| 2 | SEALS | AIPC 54-52-81-34-060 |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 54-52-11-000-807-A | Removal of the Access Skin Panels |
| TASK 54-52-11-400-807-A | Installation of the Access Skin Panels |
| TASK 78-30-00-040-807-A | Deactivation of the Thrust Reverser System for Nacelle Maintenance (ICU) |
| TASK 78-30-00-440-807-A | Reactivation of the Thrust Reverser System after Nacelle Maintenance (ICU) |
Upper Seals of the Bleed-Air Precooler ExchangerSubtask 54-52-22-941-053-A
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 was in the OFF position not less than five minutes before you do this procedure.
(c) Put a 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 a WARNING NOTICE(S) in position to tell persons not to energize FADEC 1(2).
Subtask 54-52-22-040-052-A (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 was in the OFF position not less than five minutes before you do this procedure.
(c) Put a 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 a WARNING NOTICE(S) in position to tell persons not to energize FADEC 1(2).
B. Deactivation of the Thrust Reverser
Subtask 54-52-22-010-052-A 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 78-30-00-040-807). C. Get Access
(1) Put an ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position:
(a) For the left pylon, in zone 410
(b) For the right pylon, in zone 420.
(2) Remove the access skin panels (Ref. AMM TASK 54-52-11-000-807):
(a) For the left pylon: 413DT
(b) For the right pylon: 423DT.
4. Procedure(1) Put an ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position:
(a) For the left pylon, in zone 410
(b) For the right pylon, in zone 420.
(2) Remove the access skin panels (Ref. AMM TASK 54-52-11-000-807):
(a) For the left pylon: 413DT
(b) For the right pylon: 423DT.
Subtask 54-52-22-300-053-A
A. Replacement of the Upper Seals of the Bleed-Air Precooler Exchanger
(1) Remove the used seals (2) and (3) from the access panel (1) and discard them.
(2) Install new AIPC 54-52-81-33-060 SEALS (2) (left) and new AIPC 54-52-81-34-060 SEALS (2) (right).
(3) Install new AIPC 54-52-81-33-050 SEALS (3) (left) and new AIPC 54-52-81-34-050 SEALS (3) (right).
(4) Make sure that the seals are correctly assembled in their brackets and that they have the correct orientation.
5. Close-up(1) Remove the used seals (2) and (3) from the access panel (1) and discard them.
(2) Install new AIPC 54-52-81-33-060 SEALS (2) (left) and new AIPC 54-52-81-34-060 SEALS (2) (right).
(3) Install new AIPC 54-52-81-33-050 SEALS (3) (left) and new AIPC 54-52-81-34-050 SEALS (3) (right).
(4) Make sure that the seals are correctly assembled in their brackets and that they have the correct orientation.
Subtask 54-52-22-410-052-A
A. Close Access
(1) Install the access skin panels (Ref. AMM TASK 54-52-11-400-807):
(a) For the left pylon: 413DT
(b) For the right pylon: 423DT.
Subtask 54-52-22-440-052-A (1) Install the access skin panels (Ref. AMM TASK 54-52-11-400-807):
(a) For the left pylon: 413DT
(b) For the right pylon: 423DT.
B. Reactivation of the Thrust Reverser
(1) Make the thrust reverser serviceable after maintenance (Ref. AMM TASK 78-30-00-440-807).
Subtask 54-52-22-942-052-A (1) Make the thrust reverser serviceable after maintenance (Ref. AMM TASK 78-30-00-440-807).
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).
(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).