DOC AIRBUS | AMM A320FRemoval of the NLG Door Uplock Assy
TASK 32-31-14-000-001-A
Removal of the NLG Door Uplock Assy
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Referenced Information
3. Job Set-up
Subtask 32-31-14-860-051-A
Subtask 32-31-14-020-051-B
[Rev.10 from 2021]
2026.04.01 12:31:03 UTC
Removal of the NLG Door Uplock Assy
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 LANDING GEAR ARE CLEAR.
1. Reason for the JobSelf explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | AR | ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE |
| No specific | AR | CAP - BLANKING |
| No specific | AR | CONTAINER 5 L (1.32 USGAL) |
| No specific | AR | PLUG - BLANKING |
| No specific | AR | SAFETY BARRIER(S) |
| No specific | AR | SAFETY CLIP - CIRCUIT BREAKER |
| No specific | AR | WARNING NOTICE(S) |
| 98D32203502000 | 2 | SAFETY PIN - NLG DOOR |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 29-00-00-864-001-A | Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action |
| TASK 29-14-00-614-001-A | Depressurization of the Hydraulic Reservoirs |
| 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 32-22-00-010-001-A | Nose Gear Doors - Ground Doors Opening |
NLG Door Uplock AssySubtask 32-31-14-860-051-A
A. Aircraft Maintenance Configuration
(1) Make sure that the Green hydraulic system is depressurized and put it in the maintenance configuration.
(Ref. AMM TASK 29-00-00-864-001)
(2) Depressurize the reservoir of the Green hydraulic system
(Ref. AMM TASK 29-14-00-614-001)
Subtask 32-31-14-010-050-A (1) Make sure that the Green hydraulic system is depressurized and put it in the maintenance configuration.
(Ref. AMM TASK 29-00-00-864-001)
(2) Depressurize the reservoir of the Green hydraulic system
(Ref. AMM TASK 29-14-00-614-001)
B. Get Access
(1) Open the doors of the nose landing gear (Ref. AMM TASK 32-22-00-010-001).
(2) Put the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position in zone 123.
Subtask 32-31-14-941-050-A (1) Open the doors of the nose landing gear (Ref. AMM TASK 32-22-00-010-001).
(2) Put the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position in zone 123.
C. Safety Precautions
(1) In the cockpit, on the panel 400VU put WARNING NOTICE(S) in position to tell persons not to operate the landing gear control lever.
(2) Put the WARNING NOTICE(S) in position to tell persons not pressurize the Green hydraulic system:
(4) Put a CONTAINER 5 L (1.32 USGAL) in position below the NLG door uplock assy (2534GM).
(5) Obey the applicable safety precautions before you open the LGCIU circuit breakers (Ref. AMM TASK 32-00-00-860-001).
Subtask 32-31-14-865-050-A (1) In the cockpit, on the panel 400VU put WARNING NOTICE(S) in position to tell persons not to operate the landing gear control lever.
(2) Put the WARNING NOTICE(S) in position to tell persons not pressurize the Green hydraulic system:
- on the panel 40VU in the cockpit,
- on the ground service panel of the Green hydraulic system access door (197CB).
(4) Put a CONTAINER 5 L (1.32 USGAL) in position below the NLG door uplock assy (2534GM).
(5) Obey the applicable safety precautions before you open the LGCIU circuit breakers (Ref. AMM TASK 32-00-00-860-001).
D. Open, safety and tag this(these) circuit breaker(s):
4. Procedure| PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C ALL | |||
| 49VU | L/G/LGCIU/SYS1/NORM | 1GA | C09 |
| 121VU | HYDRAULIC/LGCIU/SYS2 | 2GA | Q35 |
| 121VU | HYDRAULIC/LGCIU/SYS1/GRND SPLY | 52GA | Q34 |
Subtask 32-31-14-020-051-B
A. Removal of the NLG Door Uplock Assy
(2) Remove the bolt (25) and disconnect the rod (21).
(3) Remove the cotter pin (6) and discard it. Remove the nut (5) and the washer (4).
(4) Remove the bolt (7) and disconnect the rod (8).
(5) Disconnect the electrical connectors (22) and (23) and put the CAP - BLANKING in position.
(6) Disconnect the hydraulic connectors (15) and (16) and put the PLUG - BLANKING in position.
(7) Cut and remove the lockwire. Remove the bolt (39) and the washer (38).
(8) Remove the bolt (36) and the washer (35).
(9) Remove the spacer (37). Make sure that you keep the shim between the spacer and the rear flange.
(10) Remove the cotter pin (17) and discard it. Remove the nuts (18) and the washers (24).
(11) Remove the bolt (13).
(12) Remove the 98D32203502000 SAFETY PIN - NLG DOOR
(13) Hold the uplock unit (12) and manually close the NLG doors to half travel to permit passage of the unit.
(14) Turn the uplock unit (12) and remove it.
(15) Open the NLG doors again and put the 98D32203502000 SAFETY PIN - NLG DOOR in position.
(16) Remove and discard the cotter pin (30). Remove the nut (31), the washer (32) and the screw (34). Remove the lever (33).
(17) Remove and discard the cotter pin (42). Remove the nut (40), the washer (41) and the screw (44). Remove the lever (43).
WARNING:
MAKE SURE THAT THE NLG DOWNLOCK SAFETY PIN AND THE TWO DOOR SAFETY PINS ARE INSTALLED.
(1) Remove the cotter pin (26) and discard it. Remove the nut (27) and the washer (28). (2) Remove the bolt (25) and disconnect the rod (21).
(3) Remove the cotter pin (6) and discard it. Remove the nut (5) and the washer (4).
(4) Remove the bolt (7) and disconnect the rod (8).
(5) Disconnect the electrical connectors (22) and (23) and put the CAP - BLANKING in position.
(6) Disconnect the hydraulic connectors (15) and (16) and put the PLUG - BLANKING in position.
(7) Cut and remove the lockwire. Remove the bolt (39) and the washer (38).
(8) Remove the bolt (36) and the washer (35).
(9) Remove the spacer (37). Make sure that you keep the shim between the spacer and the rear flange.
(10) Remove the cotter pin (17) and discard it. Remove the nuts (18) and the washers (24).
(11) Remove the bolt (13).
(12) Remove the 98D32203502000 SAFETY PIN - NLG DOOR
(13) Hold the uplock unit (12) and manually close the NLG doors to half travel to permit passage of the unit.
(14) Turn the uplock unit (12) and remove it.
(15) Open the NLG doors again and put the 98D32203502000 SAFETY PIN - NLG DOOR in position.
(16) Remove and discard the cotter pin (30). Remove the nut (31), the washer (32) and the screw (34). Remove the lever (33).
(17) Remove and discard the cotter pin (42). Remove the nut (40), the washer (41) and the screw (44). Remove the lever (43).