DOC AIRBUS | AMM A320FRemoval of the Uplock Assembly with A/C on Jacks
TASK 32-31-44-000-003-A
Removal of the Uplock Assembly with A/C on Jacks
1. Reason for the Job
This task is only applicable if, in the installation procedure, the setting tool-uplock is used. This is necessary if there is new adjustment of the uplock assembly.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Referenced Information
3. Job Set-up
Subtask 32-31-44-941-055-A ** ON A/C NOT FOR ALL
Subtask 32-31-44-020-053-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 00:45:25 UTC
Removal of the Uplock Assembly with A/C on Jacks
1. Reason for the Job
This task is only applicable if, in the installation procedure, the setting tool-uplock is used. This is necessary if there is new adjustment of the uplock assembly.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | AR | CAP - BLANKING |
| No specific | AR | PLUG - BLANKING |
| No specific | AR | SAFETY BARRIER(S) |
| No specific | AR | SAFETY CLIP - CIRCUIT BREAKER |
| No specific | 1 | WARNING NOTICE(S) |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 07-11-00-581-001-A | Lifting for Aircraft Maintenance Operations |
| 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 32-00-00-481-001-A | Installation of the Safety Devices on the Landing Gears |
| 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 32-31-44-941-055-A ** ON A/C NOT FOR ALL
A. Safety Precautions
(1) Put the SAFETY BARRIER(S) in position.
(2) Make sure that the ground safety locks are on the landing gear (Ref. AMM TASK 32-00-00-481-001).
(3) Put a WARNING NOTICE(S) on the ground service connection to tell persons not to pressurize the Green and Yellow hydraulic systems.
(4) On the panel 400VU:
Subtask 32-31-44-860-056-A ** ON A/C NOT FOR ALL (1) Put the SAFETY BARRIER(S) in position.
(2) Make sure that the ground safety locks are on the landing gear (Ref. AMM TASK 32-00-00-481-001).
(3) Put a WARNING NOTICE(S) on the ground service connection to tell persons not to pressurize the Green and Yellow hydraulic systems.
(4) On the panel 400VU:
- Make sure that the landing-gear control-lever 6GA is in the DOWN position
- Put a WARNING NOTICE(S) in position to tell persons not to operate the landing gear.
B. Aircraft Maintenance Configuration
(1) To do this task it is necessary to put the aircraft on jacks (Ref. AMM TASK 07-11-00-581-001).
(2) Make sure that the aircraft electrical circuits are energized (Ref. AMM TASK 24-41-00-861-002)
(3) As necessary, use the applicable SAFETY BARRIERS, specified by the operator's instructions and your local regulations.
Subtask 32-31-44-010-053-A ** ON A/C NOT FOR ALL Subtask 32-31-44-869-054-A ** ON A/C NOT FOR ALL (1) To do this task it is necessary to put the aircraft on jacks (Ref. AMM TASK 07-11-00-581-001).
(2) Make sure that the aircraft electrical circuits are energized (Ref. AMM TASK 24-41-00-861-002)
(3) As necessary, use the applicable SAFETY BARRIERS, specified by the operator's instructions and your local regulations.
D. Disconnection of the PTU Isolation Coupling
(1) Depressurize the Green hydraulic system is (Ref. AMM TASK 29-10-00-864-001).
(2) Depressurize the reservoir of the Green hydraulic system (Ref. AMM TASK 29-14-00-614-001).
(3) Obey the flight configuration precautions (Ref. AMM TASK 32-00-00-860-001).
Subtask 32-31-44-865-056-A ** ON A/C NOT FOR ALL (1) Depressurize the Green hydraulic system is (Ref. AMM TASK 29-10-00-864-001).
(2) Depressurize the reservoir of the Green hydraulic system (Ref. AMM TASK 29-14-00-614-001).
(3) Obey the flight configuration precautions (Ref. AMM TASK 32-00-00-860-001).
E. Open, safety and tag this(these) circuit breaker(s):
4. Procedure| PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR 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/LGCIU/SYS2 | 2GA | Q35 |
| 121VU | HYDRAULIC/LGCIU/SYS1/GRND SPLY | 52GA | Q34 |
| 121VU | HYDRAULIC/G HYD/PUMP ENG1/MONG | 1702GK | R34 |
Subtask 32-31-44-020-053-A ** ON A/C NOT FOR ALL
A. Removal of the MLG Uplock Assembly 2509GM (2510GM) view B
(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) Remove the bonding strap (view E):
(a) Remove the nut (21), the washer (22), the bolt (14) and disconnect the bonding strap (13) from the uplock assembly (8).
(8) Disconnect the Free Fall Exstension 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).
(c) Move the rod (35) away from the lever (29).
(9) Disconnect the Strut A (4) view E:
(a) Remove and discard the cotter pin (15).
(b) Remove the nut (16), the washers (17), (18) the bolt (20) and the washer assembly (19).
(c) Move the strut (4) away from the uplock assembly (8).
(10) Disconnect the Strut B (10) view F:
(a) Remove and discard the cotter pin (28).
(b) Remove the nut (27), the washers (25), (26) the bolt (23) and the washer assembly (24).
(c) Move the strut (10) away from the uplock assembly (8).
(11) Remove the MLG Uplock Assembly 2509GM (2510GM) 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 installation 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) Remove the bonding strap (view E):
(a) Remove the nut (21), the washer (22), the bolt (14) and disconnect the bonding strap (13) from the uplock assembly (8).
(8) Disconnect the Free Fall Exstension 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).
(c) Move the rod (35) away from the lever (29).
(9) Disconnect the Strut A (4) view E:
(a) Remove and discard the cotter pin (15).
(b) Remove the nut (16), the washers (17), (18) the bolt (20) and the washer assembly (19).
(c) Move the strut (4) away from the uplock assembly (8).
(10) Disconnect the Strut B (10) view F:
(a) Remove and discard the cotter pin (28).
(b) Remove the nut (27), the washers (25), (26) the bolt (23) and the washer assembly (24).
(c) Move the strut (10) away from the uplock assembly (8).
(11) Remove the MLG Uplock Assembly 2509GM (2510GM) 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).