DOC AIRBUS | AMM A320FInstallation of the Bleed-Air Precooler Exchanger
TASK 36-11-42-400-001-A
Installation of the Bleed-Air Precooler Exchanger
Self explanatory
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 36-11-42-860-050-A ** ON A/C NOT FOR ALL
Subtask 36-11-42-420-052-A ** ON A/C NOT FOR ALL
Subtask 36-11-42-410-050-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 01:09:17 UTC
Installation of the Bleed-Air Precooler Exchanger
WARNING:
MAKE SURE THAT THE PNEUMATIC SYSTEM IS DEPRESSURIZED BEFORE YOU START WORK. PRESSURIZED AIR CAN CAUSE INJURY TO PERSONNEL.
WARNING:
BE CAREFUL WHEN YOU DO WORK ON THE ENGINE PARTS AFTER THE ENGINE SHUTDOWN. USE APPLICABLE THERMAL GLOVES. THE ENGINE PARTS CAN STAY HOT FOR ONE HOUR AFTER SHUTDOWN AND CAN BURN YOU.
1. Reason for the JobSelf explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | AR | ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE |
| No specific | AR | WARNING NOTICE(S) |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 211 | COCKPIT |
| 413 | UPPER FWD PYLON |
| 423 | UPPER FWD PYLON |
| 413DT, 423DT | |
| 413CL, 413DL, 414CR, 423CL, 423DL, 424CR |
| FIG.ITEM | DESIGNATION | IPC-CSN |
|---|---|---|
| 8 | SEAL | AIPC 36-11-06-01-315 |
| 2 | SEAL | AIPC 36-11-06-01-320 |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 24-41-00-861-002-A | Energize the Aircraft Electrical Circuits from the External Power |
| TASK 24-41-00-861-002-A-01 | Energize the Aircraft Electrical Circuits from the APU |
| TASK 24-41-00-862-002-A | De-energize the Aircraft Electrical Circuits Supplied from the External Power |
| TASK 24-41-00-862-002-A-01 | De-energize the Aircraft Electrical Circuits Supplied from the APU |
| TASK 36-12-00-860-001-A | Pressurization of the Bleed System with the APU |
| TASK 36-12-00-860-002-A | Pressurization of the Bleed System through the HP Ground Connector |
| TASK 49-00-00-860-006-A | APU Shutdown by External Power |
| TASK 49-00-00-860-006-A-01 | APU Shutdown by Batteries |
| TASK 49-00-00-860-009-A | APU Shutdown by External Power (131-9(A)) |
| TASK 49-00-00-860-009-A-01 | APU Shutdown by Batteries (131-9(A)) |
| TASK 54-52-11-000-002-A | Removal of the Access Panels |
| TASK 54-52-11-000-002-B | Removal of the Access Panels |
| TASK 54-52-11-400-002-A | Installation of the Access Panels |
| TASK 54-52-11-400-002-B | Installation of the Access Panels |
Bleed-Air Precooler ExchangerSubtask 36-11-42-860-050-A ** ON A/C NOT FOR ALL
A. Aircraft Maintenance Configuration
(1) Make sure that the aircraft electrical circuits are energized (Ref. AMM TASK 24-41-00-861-002) or (Ref. AMM TASK 24-41-00-861-002).
(2) Make sure that the engine 1(2) is shutdown for a minimum of 5 minutes before you do this procedure.
(3) In the cockpit, on AIR COND panel 30VU:
(a) Make sure that the ENG 1(2) BLEED pushbutton-switch is released (the OFF legend is on).
(b) Make sure that the APU BLEED pushbutton-switch is released (the ON legend is off).
(c) Make sure that the WARNING NOTICE(S) is in position to tell persons not to operate the pneumatic system.
(4) In the cockpit, on the ENG panel 115VU:
(a) Make sure that the WARNING NOTICE(S) is in position to tell persons not to start engine 1(2).
(5) On the HP ground connector:
(a) Make sure that the WARNING NOTICE(S) is in position to tell persons not to pressurize the pneumatic system.
(6) On the ENG section of maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR 1(2) pushbutton-switch is off.
(b) Make sure that the WARNING NOTICE(S) is in position to tell persons not to energize FADEC 1(2).
(7) Make sure that the ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE is in position below the engine.
Subtask 36-11-42-010-051-A ** ON A/C NOT FOR ALL (1) Make sure that the aircraft electrical circuits are energized (Ref. AMM TASK 24-41-00-861-002) or (Ref. AMM TASK 24-41-00-861-002).
(2) Make sure that the engine 1(2) is shutdown for a minimum of 5 minutes before you do this procedure.
(3) In the cockpit, on AIR COND panel 30VU:
(a) Make sure that the ENG 1(2) BLEED pushbutton-switch is released (the OFF legend is on).
(b) Make sure that the APU BLEED pushbutton-switch is released (the ON legend is off).
(c) Make sure that the WARNING NOTICE(S) is in position to tell persons not to operate the pneumatic system.
(4) In the cockpit, on the ENG panel 115VU:
(a) Make sure that the WARNING NOTICE(S) is in position to tell persons not to start engine 1(2).
(5) On the HP ground connector:
(a) Make sure that the WARNING NOTICE(S) is in position to tell persons not to pressurize the pneumatic system.
(6) On the ENG section of maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR 1(2) pushbutton-switch is off.
(b) Make sure that the WARNING NOTICE(S) is in position to tell persons not to energize FADEC 1(2).
(7) Make sure that the ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE is in position below the engine.
B. Get Access
(1) Make sure that the applicable access panels that follow are removed:
(a) For the left pylon:
(b) For the right pylon:
Subtask 36-11-42-010-051-B ** ON A/C NOT FOR ALL (1) Make sure that the applicable access panels that follow are removed:
(a) For the left pylon:
(b) For the right pylon:
B. Get Access
(1) Make sure that the applicable access panels that follow are removed:
(a) For the left pylon:
(b) For the right pylon:
4. Procedure(1) Make sure that the applicable access panels that follow are removed:
(a) For the left pylon:
(b) For the right pylon:
Subtask 36-11-42-420-052-A ** ON A/C NOT FOR ALL
A. Installation of the Bleed-Air Precooler Exchanger
(1) If you use the APU to energize the electrical circuits, stop the APU:
(a) Make sure that the pressure and the temperature of the bleed-air duct system are in ambient conditions.
(4) Make sure that the surface of the seal (2) that touches the channel (3) is in the correct position.
(5) Install the new AIPC 36-11-06-01-320 SEAL (2) on the lower section of the precooler (5).
(6) Install the new AIPC 36-11-06-01-315 SEAL (8) on the upper section of the precooler (5).
(7) Remove the PLUG-BLANKING from each disconnected line end.
(8) Install the precooler (5) with its new seals (2) and (8) on the inlet (3).
(9) Make sure that the precooler (5) is in the correct position in relation to the pneumatic lines.
(10) Install the clamps (1) and (4) and torque to the values given on the clamps.
Subtask 36-11-42-720-050-A ** ON A/C NOT FOR ALL (1) If you use the APU to energize the electrical circuits, stop the APU:
- For GTCP 36-300 APU (Ref. AMM D/O 49-00-00-86)
- For APS 3200 APU (Ref. AMM TASK 49-00-00-860-006)
- For 131-9(A) APU (Ref. AMM TASK 49-00-00-860-009).
(a) Make sure that the pressure and the temperature of the bleed-air duct system are in ambient conditions.
WARNING:
MAKE SURE THAT THE PNEUMATIC SYSTEM IS DEPRESSURIZED BEFORE YOU START WORK. PRESSURIZED AIR CAN CAUSE INJURY TO PERSONNEL.
WARNING:
DO NOT TOUCH THE UNIT UNTIL IT IS SUFFICIENTLY COOL TO PREVENT BURNS WHEN YOU DO THE MAINTENANCE TASK(S).
(3) Clean the component interfaces and the adjacent area.(4) Make sure that the surface of the seal (2) that touches the channel (3) is in the correct position.
(5) Install the new AIPC 36-11-06-01-320 SEAL (2) on the lower section of the precooler (5).
(6) Install the new AIPC 36-11-06-01-315 SEAL (8) on the upper section of the precooler (5).
(7) Remove the PLUG-BLANKING from each disconnected line end.
(8) Install the precooler (5) with its new seals (2) and (8) on the inlet (3).
(9) Make sure that the precooler (5) is in the correct position in relation to the pneumatic lines.
(10) Install the clamps (1) and (4) and torque to the values given on the clamps.
B. Do this test.
(1) Pressurize the bleed system through the HP ground connector (Ref. AMM TASK 36-12-00-860-002) or with the APU (Ref. AMM TASK 36-12-00-860-001).
(2) On the AIR COND panel 30VU, set the X BLEED selector to OPEN.
(3) If you pressurize the bleed system through the HP ground connector, the supplied pressure 30 psi (2.07 bar) must be stable.
(4) Make sure that there are no leaks at the junctions upstream and downstream of the precooler exchanger on the related engine.
5. Close-up(1) Pressurize the bleed system through the HP ground connector (Ref. AMM TASK 36-12-00-860-002) or with the APU (Ref. AMM TASK 36-12-00-860-001).
(2) On the AIR COND panel 30VU, set the X BLEED selector to OPEN.
(3) If you pressurize the bleed system through the HP ground connector, the supplied pressure 30 psi (2.07 bar) must be stable.
(4) Make sure that there are no leaks at the junctions upstream and downstream of the precooler exchanger on the related engine.
Subtask 36-11-42-410-050-A ** ON A/C NOT FOR ALL
A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the applicable access panels that follow:
(a) For the left pylon:
(b) For the right pylon:
(3) Remove the access platform(s).
(4) Remove the WARNING NOTICE(S).
Subtask 36-11-42-410-050-B ** ON A/C NOT FOR ALL (1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the applicable access panels that follow:
(a) For the left pylon:
(b) For the right pylon:
(3) Remove the access platform(s).
(4) Remove the WARNING NOTICE(S).
A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the applicable access panels that follow:
(a) For the left pylon:
(b) For the right pylon:
(3) Remove the access platform(s).
(4) Remove the WARNING NOTICE(S).
Subtask 36-11-42-862-050-A ** ON A/C NOT FOR ALL (1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the applicable access panels that follow:
(a) For the left pylon:
(b) For the right pylon:
(3) Remove the access platform(s).
(4) Remove the WARNING NOTICE(S).
B. De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002) or (Ref. AMM TASK 24-41-00-862-002).
(Ref. AMM TASK 24-41-00-862-002) or (Ref. AMM TASK 24-41-00-862-002).