DOC AIRBUS | AMM A320FRemoval of the Landing Gear Safety-Valve
TASK 32-31-17-000-001-A
Removal of the Landing Gear Safety-Valve
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Referenced Information
3. Job Set-up
Subtask 32-31-17-860-050-A
Subtask 32-31-17-020-050-A
[Rev.10 from 2021]
2026.04.01 00:44:34 UTC
Removal of the Landing Gear Safety-Valve
WARNING:
MAKE SURE THAT ALL THE CIRCUITS IN MAINTENANCE ARE ISOLATED BEFORE YOU SUPPLY ELECTRICAL POWER TO THE AIRCRAFT. UNWANTED ELECTRICAL POWER CAN BE DANGEROUS.
WARNING:
PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU START A TASK ON OR NEAR:
- THE FLIGHT CONTROLS
- THE FLIGHT CONTROL SURFACES
- THE LANDING GEAR AND THE RELATED DOORS
- COMPONENTS THAT MOVE.
WARNING:
OBEY THE HYDRAULIC SAFETY PROCEDURES.
FIN: 49GA
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 1M(3 FT) |
| No specific | AR | CAP - BLANKING |
| No specific | 1 | CONTAINER 5 L (1.32 USGAL) |
| No specific | AR | SAFETY CLIP - CIRCUIT BREAKER |
| No specific | 2 | WARNING NOTICE(S) |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 20-23-21-911-001-A | Removal/Installation of the Bobbins from their Housings and Installation of O-rings, Square Seals, and Back-up Rings on the Bobbins |
| 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 29-00-00-910-002-A | Safety Procedures of the Hydraulic System |
| TASK 29-10-00-864-001-A | Depressurize the Green 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 32-00-00-860-001-A | Flight Configuration Precautions with Electrical Power |
| TASK 32-00-00-860-001-A-01 | Flight Configuration Precautions without Electrical Power |
| TASK 32-12-00-010-001-A | Open the Main Gear Doors for Access |
Landing Gear Safety-Valve 49GASubtask 32-31-17-860-050-A
A. Aircraft Maintenance Configuration
(1) De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).
(2) Depressurize the Green hydraulic system (Ref. AMM TASK 29-10-00-864-001).
(3) Depressurize the reservoir of the Green hydraulic system (Ref. AMM TASK 29-14-00-614-001).
Subtask 32-31-17-010-050-A Subtask 32-31-17-869-050-A (1) De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).
(2) Depressurize the Green hydraulic system (Ref. AMM TASK 29-10-00-864-001).
(3) Depressurize the reservoir of the Green hydraulic system (Ref. AMM TASK 29-14-00-614-001).
C. Safety Precautions
(1) Disconnect the PTU isolation coupling (Ref. AMM TASK 29-23-00-860-001).
(2) Obey the flight configuration precautions (Ref. AMM TASK 32-00-00-860-001).
(3) Put the ACCESS PLATFORM 1M(3 FT) in position.
(4) Put the CONTAINER 5 L (1.32 USGAL) below the safety valve to collect the hydraulic fluid leakage.
Subtask 32-31-17-865-050-A (1) Disconnect the PTU isolation coupling (Ref. AMM TASK 29-23-00-860-001).
(2) Obey the flight configuration precautions (Ref. AMM TASK 32-00-00-860-001).
(3) Put the ACCESS PLATFORM 1M(3 FT) in position.
(4) Put the CONTAINER 5 L (1.32 USGAL) below the safety valve to collect the hydraulic fluid leakage.
D. Open, safety and tag this(these) circuit breaker(s):
Subtask 32-31-17-941-050-A | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C ALL | |||
| 49VU | L/G/LGCIU/SYS1/NORM | 1GA | C09 |
| ** 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/LGCIU/SYS2 | 2GA | Q35 |
| 121VU | HYDRAULIC/LGCIU/SYS1/GRND SPLY | 52GA | Q34 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | HYDRAULIC/G HYD/PUMP ENG1/MONG | 1702GK | R33 |
E. Safety Precautions
(1) Put the WARNING NOTICE(S) in position to tell persons not to pressurize the Green hydraulic system:
4. Procedure(1) Put the WARNING NOTICE(S) in position to tell persons not to pressurize the Green hydraulic system:
- on the panel 40VU in the cockpit
- on the ground service panel of the Green hydraulic system.
Subtask 32-31-17-020-050-A
A. Removal of the Safety Valve
(1) Disconnect the electrical connector (8) from the safety valve (7).
(2) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(3) Remove the nut (21), the bolt (17), the washer (18) and the bonding strap (19) from the safety valve (7).
(4) Remove the bolts (10), the washers (9) and the safety valve (7).
(5) Remove and discard the packings (2) and (16) and the back-up rings (3) and (15) from the bobbins (4) and (14).
(6) If necessary, remove the bobbins (4) and (14) from the safety valve (7), and remove and discard:
(1) Disconnect the electrical connector (8) from the safety valve (7).
(2) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(3) Remove the nut (21), the bolt (17), the washer (18) and the bonding strap (19) from the safety valve (7).
(4) Remove the bolts (10), the washers (9) and the safety valve (7).
(5) Remove and discard the packings (2) and (16) and the back-up rings (3) and (15) from the bobbins (4) and (14).
(6) If necessary, remove the bobbins (4) and (14) from the safety valve (7), and remove and discard:
- the back-up rings (5) and (13) and the square seals (6) and (12) (Ref. AMM TASK 20-23-21-911-001).