DOC AIRBUS | AMM A320FRemoval of the Low Pressure Filter-Assembly
TASK 29-11-44-000-001-A
Removal of the Low Pressure Filter-Assembly
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 29-11-44-865-050-A
Subtask 29-11-44-020-052-A
[Rev.10 from 2021]
2026.04.01 00:16:24 UTC
Removal of the Low Pressure Filter-Assembly
WARNING:
MAKE SURE THAT THE GROUND SAFETY-LOCKS ARE IN POSITION ON THE LANDING GEAR. THIS WILL PREVENT UNWANTED MOVEMENT OF THE LANDING GEAR, AND THUS POSSIBLE INJURY TO PERSONS AND DAMAGE TO THE AIRCRAFT AND/OR EQUIPMENT.
WARNING:
MAKE SURE THAT THE TRAVEL RANGES OF THE FLIGHT CONTROLS SURFACES ARE CLEAR. MOVEMENT OF FLIGHT CONTROLS CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.
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 3M (10 FT) |
| No specific | AR | CAP - BLANKING |
| No specific | 1 | CONTAINER 20L (5 USGAL) |
| No specific | 1 | PLUG - BLANKING |
| No specific | AR | SAFETY CLIP - CIRCUIT BREAKER |
| No specific | 2 | WARNING NOTICE(S) |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 148 | MAIN GEAR WELL AND HYDRAULIC COMPARTMENT |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 29-00-00-864-001-A | Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action |
| TASK 29-00-00-910-002-A | Safety Procedures of the Hydraulic System |
| TASK 29-14-00-614-001-A | Depressurization of the Hydraulic Reservoirs |
| TASK 29-23-00-860-001-A | Disconnection of the Isolation Coupling of the Power Transfer Unit (PTU) |
| TASK 32-12-00-010-001-A | Open the Main Gear Doors for Access |
Low Pressure Filter-AssemblySubtask 29-11-44-865-050-A
A. Open, safety and tag this(these) circuit breaker(s):
Subtask 29-11-44-860-055-A | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C ALL | |||
| 49VU | HYD/HYD/PRESS/XMTR | 1841GN | C11 |
| ** ON A/C NOT FOR ALL | |||
| 49VU | HYDRAULIC/G HYD/PUMP ENG1/CTL | 1701GK | H12 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | HYDRAULIC/G HYD/PUMP ENG1/CTL | 1701GK | R35 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | HYDRAULIC/G HYD/PUMP ENG1/MONG | 1702GK | R34 |
| ** ON A/C ALL | |||
| 121VU | HYDRAULIC/SOL VALVES/G/Y/B/LEAK/TST | 1881GP | N35 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | HYDRAULIC/G HYD/PUMP ENG1/MONG | 1702GK | R33 |
B. Aircraft Maintenance Configuration
(2) Put the warning notices in position to tell persons not to pressurize the Green hydraulic system:
(4) Make sure that the Green hydraulic system is depressurized and put it in the maintenance configuration.
(Ref. AMM TASK 29-00-00-864-001).
(5) Depressurize the reservoir of the Green hydraulic system (Ref. AMM TASK 29-14-00-614-001).
(6) Disconnect the isolation coupling of the the Power Transfer Unit (PTU) (Ref. AMM TASK 29-23-00-860-001).
(7) Put the ACCESS PLATFORM 3M (10 FT) in position at the low pressure filter-assembly.
(8) Put a CONTAINER 20L (5 USGAL) below the low pressure filter-assembly to collect all the hydraulic fluid.
4. ProcedureWARNING:
OBEY THE HYDRAULIC SAFETY PROCEDURES.
(1) Obey the hydraulic safety procedures (Ref. AMM TASK 29-00-00-910-002). (2) Put the warning notices in position to tell persons not to pressurize the Green hydraulic system:
- Put a WARNING NOTICE(S) in the cockpit on the hydraulic section 40VU of the overhead panel.
- Put a WARNING NOTICE(S) on the ground service panel of the Green hydraulic system.
(4) Make sure that the Green hydraulic system is depressurized and put it in the maintenance configuration.
(Ref. AMM TASK 29-00-00-864-001).
(5) Depressurize the reservoir of the Green hydraulic system (Ref. AMM TASK 29-14-00-614-001).
(6) Disconnect the isolation coupling of the the Power Transfer Unit (PTU) (Ref. AMM TASK 29-23-00-860-001).
(7) Put the ACCESS PLATFORM 3M (10 FT) in position at the low pressure filter-assembly.
(8) Put a CONTAINER 20L (5 USGAL) below the low pressure filter-assembly to collect all the hydraulic fluid.
Subtask 29-11-44-020-052-A
A. Removal of the Low Pressure Filter-Assembly (1002GM)
(2) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(3) Disconnect the bonding strap (6):
(4) Loosen the pipe end-fitting (11) and disconnect the pipe (12) from the union (10).
(5) Loosen the coupling nut (1) and disconnect it from the union (2).
(6) Hold the low pressure filter-assembly (13) and remove the three bolts (14) and the washers (15).
(7) Remove the low pressure filter-assembly (13) from the bracket (16).
(8) Put a PLUG - BLANKING on each disconnected pipe end and each open port of the low pressure filter-assembly.
CAUTION:
USE A SECOND WRENCH TO APPLY COUNTERTORQUE TO THE UNION WHEN YOU DISCONNECT/CONNECT HYDRAULIC LINES ON UNIONS. IF YOU DO NOT USE THE SECOND WRENCH, THERE IS A RISK THAT YOU WILL LOOSEN OR TIGHTEN THE UNION TOO MUCH.
(1) Disconnect the electrical connector (7) from the temperature transmitter (8). (2) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(3) Disconnect the bonding strap (6):
CAUTION:
MAKE SURE THAT THE ELECTRICAL CONNECTOR(S) IS(ARE) DISCONNECTED BEFORE YOU DISCONNECT THE BONDING STRAP(S).
(a) Remove the nut (4) and the washer (5) and disconnect the bonding strap (6) from the temperature transmitter (8). (4) Loosen the pipe end-fitting (11) and disconnect the pipe (12) from the union (10).
(5) Loosen the coupling nut (1) and disconnect it from the union (2).
(6) Hold the low pressure filter-assembly (13) and remove the three bolts (14) and the washers (15).
(7) Remove the low pressure filter-assembly (13) from the bracket (16).
(8) Put a PLUG - BLANKING on each disconnected pipe end and each open port of the low pressure filter-assembly.