DOC AIRBUS | AMM A320FRemoval of the MLG Uplock Assembly
TASK 32-31-44-000-001-A
Removal of the MLG Uplock Assembly
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Referenced Information
3. Job Set-up
Subtask 32-31-44-860-050-A
Subtask 32-31-44-020-051-A
[Rev.10 from 2021]
2026.04.01 00:45:21 UTC
Removal of the MLG Uplock Assembly
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.
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 2M (6 FT) - ADJUSTABLE |
| No specific | AR | CAP - BLANKING |
| No specific | 1 | CONTAINER 5 L (1.32 USGAL) |
| No specific | AR | PLUG - BLANKING |
| No specific | AR | SAFETY CLIP - CIRCUIT BREAKER |
| No specific | AR | WARNING NOTICE(S) |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 24-41-00-861-002-A | Energize the Aircraft Electrical Circuits from the External Power |
| TASK 24-41-00-861-002-A-01 | Energize the Aircraft Electrical Circuits from the APU |
| TASK 24-41-00-861-002-A-02 | Energize the Aircraft Electrical Circuits from 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 |
MLG Uplock Assembly 2509GM (2510GM)Subtask 32-31-44-860-050-A
A. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).
(2) Depressurize the Green hydraulic system (Ref. AMM TASK 29-10-00-864-001).
Subtask 32-31-44-010-050-A Subtask 32-31-44-869-050-A (1) Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).
(2) Depressurize the Green hydraulic system (Ref. AMM TASK 29-10-00-864-001).
C. Disconnection of the PTU Isolation Coupling
(1) Depressurize the reservoir of the Green hydraulic system (Ref. AMM TASK 29-14-00-614-001).
(2) Disconnect the PTU isolation coupling (Ref. AMM TASK 29-23-00-860-001).
(3) Obey the flight configuration precautions (Ref. AMM TASK 32-00-00-860-001).
Subtask 32-31-44-865-050-A (1) Depressurize the reservoir of the Green hydraulic system (Ref. AMM TASK 29-14-00-614-001).
(2) Disconnect the PTU isolation coupling (Ref. AMM TASK 29-23-00-860-001).
(3) Obey the flight configuration precautions (Ref. AMM TASK 32-00-00-860-001).
D. Open, safety and tag this(these) circuit breaker(s):
Subtask 32-31-44-941-050-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 ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position.
(2) Put the CONTAINER 5 L (1.32 USGAL) below the uplock assembly 2509GM (2510GM) to collect the hydraulic fluid leakage.
(3) Put the WARNING NOTICE(S) in position to tell persons not to pressurize the Green hydraulic system:
4. Procedure(1) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position.
(2) Put the CONTAINER 5 L (1.32 USGAL) below the uplock assembly 2509GM (2510GM) to collect the hydraulic fluid leakage.
(3) 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 32-31-44-020-051-A
A. Removal of the MLG Uplock Assembly 2509GM (2510GM)
(1) Obey the hydraulic safety procedures (Ref. AMM TASK 29-00-00-910-002).
(2) Disconnect the electrical connectors (5) and (6) from the uplock assembly (8).
(3) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(4) Make a note of the dimension "X".
(6) Put the PLUG-BLANKING in each disconnected line end.
(7) Disconnect the Free Fall Extension-Rod (35) view D:
(a) Remove and discard the cotter pin (38).
(b) Remove the nut (36), the washer (37), the bolt (33) and the bush (34). Move the rod (35) away from the lever (29).
(8) Disconnect the Strut B (10) view F:
(a) Remove and discard the cotter pin (28).
(b) Remove the nut (27), the washers (26) and (25).
(c) Remove the bolt (23) the washer assembly (24) and move the strut (10) away from the uplock assembly (8).
(9) Disconnect the Strut A (4) view E:
(a) Remove the nut (21), the washer (22), the bolt (14) and disconnect the bonding strap (13) from the uplock assembly (8).
(b) Remove and discard the cotter pin (15).
(c) Remove the nut (16), the washers (17) and (18).
(d) Remove the bolt (20) the washer assembly (19) and move the strut (4) away from the uplock assembly (8).
(10) Remove the Uplock Assembly (8) view B:
(a) Remove and discard the cotter pin (3).
(c) If necessary remove the inner bush (1).
(1) Obey the hydraulic safety procedures (Ref. AMM TASK 29-00-00-910-002).
(2) Disconnect the electrical connectors (5) and (6) from the uplock assembly (8).
(3) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(4) Make a note of the dimension "X".
NOTE: This dimension is necessary for the installaton of the new component.
(5) Disconnect the hydraulic hoses (7) and (9) from the uplock assembly (8). (6) Put the PLUG-BLANKING in each disconnected line end.
(7) Disconnect the Free Fall Extension-Rod (35) view D:
(a) Remove and discard the cotter pin (38).
(b) Remove the nut (36), the washer (37), the bolt (33) and the bush (34). Move the rod (35) away from the lever (29).
(8) Disconnect the Strut B (10) view F:
(a) Remove and discard the cotter pin (28).
(b) Remove the nut (27), the washers (26) and (25).
(c) Remove the bolt (23) the washer assembly (24) and move the strut (10) away from the uplock assembly (8).
(9) Disconnect the Strut A (4) view E:
(a) Remove the nut (21), the washer (22), the bolt (14) and disconnect the bonding strap (13) from the uplock assembly (8).
(b) Remove and discard the cotter pin (15).
(c) Remove the nut (16), the washers (17) and (18).
(d) Remove the bolt (20) the washer assembly (19) and move the strut (4) away from the uplock assembly (8).
(10) Remove the Uplock Assembly (8) view B:
(a) Remove and discard the cotter pin (3).
WARNING:
SUPPORT THE UNIT/ASSEMBLY. THE UNIT/ASSEMBLY IS HEAVY. IF YOU DO NOT SUPPORT IT, IT WILL FALL. THIS CAN CAUSE INJURY TO PERSONS, AND/OR DAMAGE TO EQUIPMENT.
(b) Remove the nut (2), the bolt (11), the washer (12), the outer bush (1) and remove the uplock assembly (8). (c) If necessary remove the inner bush (1).