W DOC AIRBUS | AMM A320F

Removal of the Bleed-Air Precooler Exchanger

TASK 36-11-42-000-001-A
Removal 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.
ZONE: 211
ZONE: 413
ZONE: 423
FIN: 7150HM ** ON A/C NOT FOR ALL
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 4M (13 FT)-ADJUSTABLE
No specific
AR
PLUG - BLANKING
No specific
AR
WARNING NOTICE(S)
 B. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
211
COCKPIT
413
UPPER FWD PYLON
423
UPPER FWD PYLON
413DT, 423DT
413CL, 413DL, 414CR, 423CL, 423DL, 424CR
 C. Referenced Information
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 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
F Bleed-Air Precooler Exchanger ** ON A/C NOT FOR ALL
F Bleed-Air Precooler Exchanger ** ON A/C NOT FOR ALL
3. Job Set-up
Subtask 36-11-42-861-051-A ** ON A/C NOT FOR ALL
A. Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002) or (Ref. AMM TASK 24-41-00-861-002).
Subtask 36-11-42-941-051-A ** ON A/C NOT FOR ALL
B. Safety Precautions
   (1) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
   (2) On the AIR COND panel 30VU:
  • make sure that the ENG 1(2) BLEED pushbutton switch is released (the OFF legend is on),
  • make sure that the APU BLEED pushbutton switch is released (the ON legend is off),
  • put a WARNING NOTICE(S) to tell persons not to operate the pneumatic system.
   (3) On the ENG panel 115VU:
  • put a WARNING NOTICE(S) to tell persons not to start the engine 1(2).
   (4) On the HP ground connector:
  • Put a WARNING NOTICE(S) to tell persons not to pressurize the pneumatic system.
   (5) On the ENG section of the maintenance panel 50VU:
  • make sure that the ON legend of the ENG/FADEC GND PWR 1(2) pushbutton switch is off,
  • put a WARNING NOTICE(S) to tell persons not to energize the FADEC 1(2).
Subtask 36-11-42-010-050-A ** ON A/C NOT FOR ALL
C. Get Access
   (1) Put the ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE in position below the applicable engine.
   (2) Remove the applicable access panels that follow:
     (a) For the left pylon:
     (b) For the right pylon:
Subtask 36-11-42-010-050-B ** ON A/C NOT FOR ALL
C. Get Access
   (1) Put the ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE in position below the engine.
   (2) Remove the applicable access panels that follow:
     (a) For the left pylon:
     (b) For the right pylon:
4. Procedure
Subtask 36-11-42-020-050-A ** ON A/C NOT FOR ALL
A. Removal of the Bleed-Air Precooler Exchanger
   (1) If you use the APU to energize the electrical circuits, stop the APU:
   (2) In the cockpit, on the SD bleed page:
     (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) Remove the clamps (1) and (4).
   (4) Remove the precooler (5) with the handles (6) and (7).
   (5) Remove the seals (2) and (8) and discard them.
   (6) Put the PLUG - BLANKING in each disconnected line end.
[Rev.10 from 2021] 2026.04.02 07:05:13 UTC
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