DOC AIRBUS | AMM A320FReactivation of the APU Bleed Check-Valve
TASK 36-12-00-440-802-A
Reactivation of the APU Bleed Check-Valve
MMEL 36-22-03A
APU LEAK DETECTION LOOP
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 36-12-00-860-070-A ** ON A/C NOT FOR ALL
Subtask 36-12-00-020-051-A ** ON A/C NOT FOR ALL
Subtask 36-12-00-410-057-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 12:39:16 UTC
Reactivation of the APU Bleed Check-Valve
WARNING:
MAKE SURE THAT THE PNEUMATIC SYSTEM IS DEPRESSURIZED BEFORE YOU START WORK. PRESSURIZED AIR CAN CAUSE INJURY TO PERSONNEL.
FIN: 7260HM ** ON A/C NOT FOR ALL
1. Reason for the JobMMEL 36-22-03A
APU LEAK DETECTION LOOP
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Work Zones and Access Panels
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 151CW, 151SW, 197BB, 197KB |
| FIG.ITEM | DESIGNATION | IPC-CSN |
|---|---|---|
| 10 | BLANKING CAP | AIPC 36-12-83-03-600 |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 12-33-21-618-001-A-02 | Pre-conditioning with the APU |
| TASK 36-22-17-000-001-A | Removal of the APU Overheat Sensing-Elements |
| TASK 36-22-17-400-001-A | Installation of the APU Overheat Sensing-Elements |
| TASK 52-30-00-860-001-A | Open the FWD or Aft Cargo-Compartment Door with the Yellow Electric Pump |
| TASK 52-30-00-860-002-A | Close the FWD or Aft Cargo-Compartment Door with the Yellow Electric Pump |
| AIPC 36-12-83-03 | |
APU Bleed Check-Valve - Blanking CapSubtask 36-12-00-860-070-A ** ON A/C NOT FOR ALL
A. Aircraft Maintenance Configuration
(1) Put the WARNING NOTICE(S) in position:
Subtask 36-12-00-010-057-A ** ON A/C NOT FOR ALL (1) Put the WARNING NOTICE(S) in position:
- In the cockpit, on engine control panel 115VU, to tell persons not to start the engine(s)
- In the cockpit, on AIR COND overhead control panel 30VU, to tell persons not to push in the APU BLEED pushbutton switch
- On the HP ground connector, to tell persons not to pressurize the pneumatic system.
B. Get Access
(1) Put the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position.
(2) Remove access panel:
(a) If installed, remove access panel 197BB
(b) If installed, remove access panel 197KB
(3) Open the aft cargo-compartment door (Ref. AMM TASK 52-30-00-860-001).
(4) In the aft cargo compartment, remove the sidewall panel:
(a) If installed, remove sidewall panel 151CW, or
(b) If installed, remove sidewall panel 151SW.
Subtask 36-12-00-865-062-A ** ON A/C NOT FOR ALL (1) Put the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position.
(2) Remove access panel:
(a) If installed, remove access panel 197BB
(b) If installed, remove access panel 197KB
(3) Open the aft cargo-compartment door (Ref. AMM TASK 52-30-00-860-001).
(4) In the aft cargo compartment, remove the sidewall panel:
(a) If installed, remove sidewall panel 151CW, or
(b) If installed, remove sidewall panel 151SW.
C. Open, safety and tag this(these) circuit breaker(s):
4. Procedure| PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 49VU | AIR BLEED/X FEED/VALVE/BAT | 2HV | D13 |
| 49VU | AIR BLEED/ENG 2/MONG | 3HA2 | D12 |
| 49VU | AIR BLEED/ENG 1/CTL | 2HA1 | D11 |
| 122VU | AIR BLEED/ENG 1/MONG | 3HA1 | Z23 |
| 122VU | AIR BLEED/ENG 2/CTL | 2HA2 | Z22 |
| 122VU | AIR BLEED/X FEED VALVE/NORM | 1HV | Z20 |
Subtask 36-12-00-020-051-A ** ON A/C NOT FOR ALL
A. Reactivation of the APU Bleed Check-Valve
(2) Loosen the nut of the clamp (3) and remove the clamp (3).
(3) Loosen the nut of the clamp (8) and remove the clamp (8).
(4) Remove the nuts (2) and the washers (1).
(5) Hold the blanking cap (10) and remove the bolts (7).
(6) Remove the blanking cap (10) and the seal (5).
(7) Put the APU bleed check-valve (6) with the seal (5) in position.
(8) Install the bolts (7), washers (1) and nuts (2).
(9) Tighten the nuts (2).
(10) Install the clamps (3) and (8).
(11) TORQUE the nuts of the clamps (3) and (8) to between 0.5 and 0.4 m.daN (44.25 and 35.40 lbf.in )
.
(12) Attach the overheat sensing elements that are near the APU bleed check-valve (6) to the ducts (9) and (4) (Ref. AMM TASK 36-22-17-400-001).
Subtask 36-12-00-865-063-A ** ON A/C NOT FOR ALL NOTE: Refer to AIPC 36-12-83-03 for the AIPC 36-12-83-03-600 BLANKING CAP (10) of the APU bleed check-valve (6) to do the procedure.
(1) Disengage the overheat sensing elements that are near the APU bleed check-valve (6) from the ducts (9) and (4) (Ref. AMM TASK 36-22-17-000-001). (2) Loosen the nut of the clamp (3) and remove the clamp (3).
(3) Loosen the nut of the clamp (8) and remove the clamp (8).
(4) Remove the nuts (2) and the washers (1).
(5) Hold the blanking cap (10) and remove the bolts (7).
(6) Remove the blanking cap (10) and the seal (5).
(7) Put the APU bleed check-valve (6) with the seal (5) in position.
(8) Install the bolts (7), washers (1) and nuts (2).
(9) Tighten the nuts (2).
(10) Install the clamps (3) and (8).
(11) TORQUE the nuts of the clamps (3) and (8) to between 0.5 and 0.4 m.daN (44.25 and 35.40 lbf.in )
. (12) Attach the overheat sensing elements that are near the APU bleed check-valve (6) to the ducts (9) and (4) (Ref. AMM TASK 36-22-17-400-001).
B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
Subtask 36-12-00-710-058-A ** ON A/C NOT FOR ALL | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 49VU | AIR BLEED/X FEED/VALVE/BAT | 2HV | D13 |
| 49VU | AIR BLEED/ENG 2/MONG | 3HA2 | D12 |
| 49VU | AIR BLEED/ENG 1/CTL | 2HA1 | D11 |
| 122VU | AIR BLEED/ENG 1/MONG | 3HA1 | Z23 |
| 122VU | AIR BLEED/ENG 2/CTL | 2HA2 | Z22 |
| 122VU | AIR BLEED/X FEED VALVE/NORM | 1HV | Z20 |
C. Leak Test of the Pneumatic Connections
(1) Do the ground air pre-conditioning with the APU (Ref. AMM TASK 12-33-21-618-001).
(2) Make sure that there are no leaks between the connections of the APU bleed check-valve (6) and the ducts (4) and (9).
5. Close-up(1) Do the ground air pre-conditioning with the APU (Ref. AMM TASK 12-33-21-618-001).
(2) Make sure that there are no leaks between the connections of the APU bleed check-valve (6) and the ducts (4) and (9).
Subtask 36-12-00-410-057-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 access panel:
(a) If removed, install access panel 197BB
(b) If removed, install access panel 197KB.
(3) In the aft cargo compartment, install the sidewall panel:
(a) If removed, install sidewall panel 151CW, or
(b) If removed, install sidewall panel 151SW.
(4) Close the aft cargo-compartment door (Ref. AMM TASK 52-30-00-860-002).
Subtask 36-12-00-942-052-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 access panel:
(a) If removed, install access panel 197BB
(b) If removed, install access panel 197KB.
(3) In the aft cargo compartment, install the sidewall panel:
(a) If removed, install sidewall panel 151CW, or
(b) If removed, install sidewall panel 151SW.
(4) Close the aft cargo-compartment door (Ref. AMM TASK 52-30-00-860-002).
B. Aircraft Maintenance Configuration
(1) Put the aircraft back to the serviceable condition.
(2) Remove the WARNING NOTICE(S).
(3) Remove the access platform(s).
(1) Put the aircraft back to the serviceable condition.
(2) Remove the WARNING NOTICE(S).
(3) Remove the access platform(s).