DOC AIRBUS | AMM A320FRemoval of the Oil Heater (131-9(A))
TASK 49-96-51-000-002-A
Removal of the Oil Heater (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 49-96-51-860-052-A ** ON A/C NOT FOR ALL
Subtask 49-96-51-020-051-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 12:43:33 UTC
Removal of the Oil Heater (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 | PLUG - BLANKING |
| No specific | AR | SAFETY CLIP - CIRCUIT BREAKER |
| 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 49-90-00-600-008-A | Oil Change (Drain Procedure) (131-9(A)) |
| TASK 49-90-00-600-008-A-01 | Oil Change (Top-Off Procedure) (131-9(A)) |
| TASK 49-90-00-600-008-A-02 | Brand/Type Oil Change (Flush Procedure) (131-(A)) |
| TASK 52-41-00-010-001-A | Open the APU Doors for Access |
Oil HeaterSubtask 49-96-51-860-052-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 the warning notice in position on panel 25VU 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 49-96-51-865-056-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 the warning notice in position on panel 25VU 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 49-96-51-010-053-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 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | APU/OIL/HTR/SPLY | 1KT | K41 |
C. Get Access
(1) Put the ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE below the APU access doors 315AL and 316AR.
(2) Open the APU access doors (Ref. AMM TASK 52-41-00-010-001)
(3) Set the LIGHT SW 11LJ to the ON position.
4. Procedure(1) Put the ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE below the APU access doors 315AL and 316AR.
(2) Open the APU access doors (Ref. AMM TASK 52-41-00-010-001)
(3) Set the LIGHT SW 11LJ to the ON position.
Subtask 49-96-51-020-051-A ** ON A/C NOT FOR ALL
A. Removal of the Oil Heater
(1) Drain the oil from the APU gearbox (Ref. AMM TASK 49-90-00-600-008).
(2) Disconnect the electrical connector (4) from the heater (3).
(3) Put CAP - BLANKING on the disconnected electrical connectors.
(4) Remove the bolts (1) and the washers (2).
(5) Pull the heater (3) out of the gearbox.
(6) Remove and discard the O-ring (5).
(7) Put a PLUG - BLANKING in the gearbox port.
(1) Drain the oil from the APU gearbox (Ref. AMM TASK 49-90-00-600-008).
(2) Disconnect the electrical connector (4) from the heater (3).
(3) Put CAP - BLANKING on the disconnected electrical connectors.
(4) Remove the bolts (1) and the washers (2).
(5) Pull the heater (3) out of the gearbox.
(6) Remove and discard the O-ring (5).
(7) Put a PLUG - BLANKING in the gearbox port.