DOC AIRBUS | AMM A320FRemoval of the Oil Filter Differential Pressure Switches (131-9(A))
TASK 49-91-14-000-002-A
Removal of the Oil Filter Differential Pressure Switches (131-9(A))
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Work Zones and Access Panels
C. Referenced Information
3. Job Set-up
Subtask 49-91-14-860-053-A ** ON A/C NOT FOR ALL
Subtask 49-91-14-020-051-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 01:33:03 UTC
Removal of the Oil Filter Differential Pressure Switches (131-9(A))
WARNING:
DO NOT TOUCH THE APU UNTIL IT IS SUFFICIENTLY COOL TO PREVENT BURNS WHEN YOU DO THE MAINTENANCE TASK(S).
1. Reason for the JobSelf explanatory
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 | CONTAINER 10 L(2 1/2 USGAL) |
| No specific | AR | PLUG - BLANKING |
| No specific | AR | SAFETY CLIP - CIRCUIT BREAKER |
| No specific | AR | WARNING NOTICE(S) |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 315AL, 316AR |
| REFERENCE | DESIGNATION |
|---|---|
| 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 |
Differential Pressure SwitchesSubtask 49-91-14-860-053-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(S) 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 49-91-14-865-055-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(S) 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 49-91-14-010-052-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 |
C. Get Access
(1) Put the ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE in position below the APU access doors 315AL 316AR.
(2) Open the access doors 315AL and 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 316AR.
(2) Open the access doors 315AL and 316AR (Ref. AMM TASK 52-41-00-010-001).
(3) Set the LIGHT control SW 11LJ to the ON position.
Subtask 49-91-14-020-051-A ** ON A/C NOT FOR ALL
A. Removal of the Differential Pressure Switches
(1) Disconnect the electrical connectors (5) from the switches (4).
(2) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(3) Put a CONTAINER 10 L(2 1/2 USGAL) below the filter housing.
(4) Remove the switches (4) from the oil filter housings (1).
(5) Remove and discard the O-rings (2) and (3).
(6) Install PLUG - BLANKING in bottom of oil filter housings (1).
(1) Disconnect the electrical connectors (5) from the switches (4).
(2) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(3) Put a CONTAINER 10 L(2 1/2 USGAL) below the filter housing.
(4) Remove the switches (4) from the oil filter housings (1).
(5) Remove and discard the O-rings (2) and (3).
(6) Install PLUG - BLANKING in bottom of oil filter housings (1).