DOC AIRBUS | AMM A320FDeactivation of the APU Load Control-Valve (131-9(A))
TASK 49-51-00-040-004-A
Deactivation of the APU Load Control-Valve (131-9(A))
MMEL 36-12-02A
APU BLEED VALVE
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Work Zones and Access Panels
D. Referenced Information
3. Job Set-up
Subtask 49-51-00-860-057-A ** ON A/C NOT FOR ALL
Subtask 49-51-00-040-051-A ** ON A/C NOT FOR ALL
Subtask 49-51-00-410-056-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 01:30:50 UTC
Deactivation of the APU Load Control-Valve (131-9(A))
WARNING:
DO NOT TOUCH THE APU UNTIL IT IS SUFFICIENTLY COOL TO PREVENT BURNS WHEN YOU DO THE MAINTENANCE TASK(S).
Task Summary
1. Reason for the Job| Access | Test | Specific Tools | Mhr | E/T | Nb Men |
|---|---|---|---|---|---|
| YES | NO | NO | 0.3 | 0.3 | 1 |
MMEL 36-12-02A
APU BLEED VALVE
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | 1 | ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE |
| No specific | AR | CAP - BLANKING |
| No specific | AR | SAFETY CLIP - CIRCUIT BREAKER |
| No specific | AR | WARNING NOTICE(S) |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.05RAB9) | Adhesive Film Tape-- Aluminium Foil - |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 315AL, 316AR |
| REFERENCE | DESIGNATION |
|---|---|
| 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 24-41-00-862-002-A-02 | De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2) |
| TASK 24-42-00-861-001-A | Energize the Ground Service Network from the External Power |
| TASK 29-00-00-864-001-A | Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action |
| TASK 52-41-00-010-001-A | Open the APU Doors for Access |
| TASK 52-41-00-410-001-A | Close the APU Doors after Access |
Load Control-Valve Position-IndicatorSubtask 49-51-00-860-057-A ** ON A/C NOT FOR ALL
A. Aircraft Maintenance Configuration
(1) Energize the ground service network
(Ref. AMM TASK 24-42-00-861-001).
(2) On the panel 25VU, make sure that the APU MASTER SW p/bsw is OFF.
(3) Put a warning notice in the cockpit to tell persons not to start the APU.
(4) Make sure that the hydraulic systems are depressurized
(Ref. AMM TASK 29-00-00-864-001).
Subtask 49-51-00-865-056-A ** ON A/C NOT FOR ALL (1) Energize the ground service network
(Ref. AMM TASK 24-42-00-861-001).
(2) On the panel 25VU, make sure that the APU MASTER SW p/bsw is OFF.
(3) Put a warning notice in the cockpit to tell persons not to start the APU.
(4) Make sure that the hydraulic systems are depressurized
(Ref. AMM TASK 29-00-00-864-001).
B. Open, safety and tag this(these) circuit breaker(s):
Subtask 49-51-00-010-054-A ** ON A/C NOT FOR ALL | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 121VU | APU/APU/CTL | 2KD | L42 |
| 121VU | APU/ECB/SPLY | 1KD | L41 |
| 122VU | AIR BLEED/X FEED VALVE/NORM | 1HV | Z20 |
C. Get Access
(1) Put the ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE in position below the APU access doors 315AL and 316AR.
(2) Open the APU access doors 315AL 316AR (Ref. AMM TASK 52-41-00-010-001).
(3) Set the LIGHT control SW 11LJ to the ON position.
4. Procedure(1) Put the ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE in position below the APU access doors 315AL and 316AR.
(2) Open the APU access doors 315AL 316AR (Ref. AMM TASK 52-41-00-010-001).
(3) Set the LIGHT control SW 11LJ to the ON position.
Subtask 49-51-00-040-051-A ** ON A/C NOT FOR ALL
A. Deactivation of the APU Load Control-Valve
(1) Make sure that the APU load control-valve position-indicator on the valve body shows the CLOSED position.
(2) Disconnect the APU load control-valve electrical plug (P12) and attach it to the aircraft structure with Adhesive Film Tape-- Aluminium Foil - (Material No.05RAB9) .
(3) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(4) Make sure that you put a WARNING NOTICE(S) in the cockpit to tell persons that the APU load control-valve is deactivated.
(5) Make the following entry in the aircraft technical log:
The APU bleed load control-valve is deactivated. The position indicator on the valve body shows the CLOSED position. Ignore the ECAM display which shows OPEN position.
5. Close-up(1) Make sure that the APU load control-valve position-indicator on the valve body shows the CLOSED position.
(2) Disconnect the APU load control-valve electrical plug (P12) and attach it to the aircraft structure with Adhesive Film Tape-- Aluminium Foil - (Material No.05RAB9) .
(3) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(4) Make sure that you put a WARNING NOTICE(S) in the cockpit to tell persons that the APU load control-valve is deactivated.
(5) Make the following entry in the aircraft technical log:
The APU bleed load control-valve is deactivated. The position indicator on the valve body shows the CLOSED position. Ignore the ECAM display which shows OPEN position.
Subtask 49-51-00-410-056-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) Set the LIGHT control SW 11LJ to the OFF position.
(3) Close the APU access doors 315AL 316AR (Ref. AMM TASK 52-41-00-410-001).
(4) Remove the access platform(s).
Subtask 49-51-00-865-057-A ** ON A/C NOT FOR ALL (1) Make sure that the work area is clean and clear of tools and other items.
(2) Set the LIGHT control SW 11LJ to the OFF position.
(3) Close the APU access doors 315AL 316AR (Ref. AMM TASK 52-41-00-410-001).
(4) Remove the access platform(s).
B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
Subtask 49-51-00-860-058-A ** ON A/C NOT FOR ALL | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 121VU | APU/APU/CTL | 2KD | L42 |
| 121VU | APU/ECB/SPLY | 1KD | L41 |
| 122VU | AIR BLEED/X FEED VALVE/NORM | 1HV | Z20 |
C. Aircraft Maintenance Configuration
(1) Put the related hydraulic system in the pressurized configuration (Ref. AMM TASK 29-00-00-864-001).
(2) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).
(3) Remove the WARNING NOTICE(S).
(1) Put the related hydraulic system in the pressurized configuration (Ref. AMM TASK 29-00-00-864-001).
(2) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).
(3) Remove the WARNING NOTICE(S).