DOC AIRBUS | AMM A320FInstallation of the Actuator of the NLG Door Uplock Assy
TASK 32-31-14-400-002-A
Installation of the Actuator of the NLG Door Uplock Assy
1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Referenced Information
3. Job Set-up
Subtask 32-31-14-860-054-A
Subtask 32-31-14-110-051-A
Subtask 32-31-14-410-052-A
[Rev.10 from 2021]
2026.04.01 00:44:27 UTC
Installation of the Actuator of the NLG Door Uplock Assy
1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.06LDG2) | Non Hardening Jointing Putty-High Temp. Area - Structure |
| (Material No.08BBB1) | Non Aqueous Cleaner-- Petroleum Based - |
| (Material No.14QFB1) | Wire-Locking Dia: 0.8 mm CRES Nickel Alloy - |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 12-12-29-611-001-A | Fill the Hydraulic Fluid Reservoir with a Hand Pump |
| 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 32-00-00-860-002-A | Ground Configuration after Flight Configuration with Electrical Power |
| TASK 32-00-00-860-002-A-01 | Ground Configuration after Flight Configuration without Electrical Power |
| TASK 32-22-00-010-001-A | Nose Gear Doors - Ground Doors Opening |
| TASK 32-22-00-410-001-A | Nose Gear Doors - Ground Doors Closing |
| TASK 32-31-00-710-002-A | Operational Test of the Landing Gear Doors (With False Targets) |
| TASK 32-31-00-710-002-A-01 | Operational Test of the Landing Gear Doors (Without False Targets) |
Subtask 32-31-14-860-054-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) Make sure that the reservoir of the Green hydraulic system is depressurized (Ref. AMM TASK 29-14-00-614-001).
(3) In the cockpit, on the panel 400VU, make sure that the WARNING NOTICE(S) is (are) in position to tell persons not to operate the landing gear control lever.
(4) Make sure that the WARNING NOTICE(S) is (are) in position to tell persons not to pressurize the Green hydraulic system:
(6) Make sure that the CONTAINER 5 L (1.32 USGAL) is in position below the NLG door uplock assy (2534GM).
(7) Make sure that the doors of the nose landing gear are open (Ref. AMM TASK 32-22-00-010-001).
(8) Make sure that the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE is in position in zone 123.
(9) Make sure that you obeyed the flight configuration precautions (Ref. AMM TASK 32-00-00-860-001).
Subtask 32-31-14-865-058-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) Make sure that the reservoir of the Green hydraulic system is depressurized (Ref. AMM TASK 29-14-00-614-001).
(3) In the cockpit, on the panel 400VU, make sure that the WARNING NOTICE(S) is (are) in position to tell persons not to operate the landing gear control lever.
(4) Make sure that the WARNING NOTICE(S) is (are) 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, access door (197CB).
(6) Make sure that the CONTAINER 5 L (1.32 USGAL) is in position below the NLG door uplock assy (2534GM).
(7) Make sure that the doors of the nose landing gear are open (Ref. AMM TASK 32-22-00-010-001).
(8) Make sure that the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE is in position in zone 123.
(9) Make sure that you obeyed the flight configuration precautions (Ref. AMM TASK 32-00-00-860-001).
B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:
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 32-31-14-110-051-A
A. Preparation for Installation
(1) Clean the surfaces and the connection elements with Non Aqueous Cleaner-- Petroleum Based - (Material No.08BBB1) and dry with filtered compressed air.
(2) Apply Non Hardening Jointing Putty-High Temp. Area - Structure (Material No.06LDG2) to the threads of the screws (4).
Subtask 32-31-14-420-054-A (1) Clean the surfaces and the connection elements with Non Aqueous Cleaner-- Petroleum Based - (Material No.08BBB1) and dry with filtered compressed air.
(2) Apply Non Hardening Jointing Putty-High Temp. Area - Structure (Material No.06LDG2) to the threads of the screws (4).
B. Installation of the Actuator of the NLG Door Uplock Assy.
(1) Put the actuator (3) in position on the NLG door uplock
(2) Install and tighten the three screws (4) on the actuator (3).
(3) Safety the three screws (4) with14QFB1 Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -
(4) Remove the blanking plugs from the disconnected line ends of the hydraulic lines (1) and (2).
(5) Connect the hydraulic lines (1) and (2) to the actuator (3).
(6) TORQUE the hydraulic lines (1) and (2) to between 1.7 and 1.5 m.daN (12.54 and 11.06 lbf.ft )
.
Subtask 32-31-14-865-059-A (1) Put the actuator (3) in position on the NLG door uplock
(2) Install and tighten the three screws (4) on the actuator (3).
(3) Safety the three screws (4) with
(4) Remove the blanking plugs from the disconnected line ends of the hydraulic lines (1) and (2).
(5) Connect the hydraulic lines (1) and (2) to the actuator (3).
(6) TORQUE the hydraulic lines (1) and (2) to between 1.7 and 1.5 m.daN (12.54 and 11.06 lbf.ft )
. C. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
Subtask 32-31-14-869-056-A | 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 |
D. After you close the LGCIU circuit breakers, put the aircraft back to the correct (ground) condition (Ref. AMM TASK 32-00-00-860-002).
Subtask 32-31-14-941-056-A E. Preparation for the Test
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the safety pin from the door ground-opening handle.
(3) Put the door ground-opening handle in the open position.
(4) Install the safety pin on the handle.
(5) Make sure that the NLG door uplock assy (2534GM) is in the open configuration.
(6) Remove the container below the NLG door uplock assy (2534GM).
(7) Make sure that the travel range of the NLG doors is clean and clear of tools and other items.
(8) Remove the access platform(s).
(9) Put the green hydraulic system back to the serviceable condition (Ref. AMM TASK 29-00-00-864-001).
(10) Make sure that the Green hydraulic system is pressurized with the PTU.
(11) Adjust the hydraulic power unit for minimum pressure and flow rate.
(12) Do 5 full DOOR CLOSE/DOOR OPEN cycles (Ref. AMM TASK 32-22-00-010-001), (Ref. AMM TASK 32-22-00-410-001) to bleed the hydraulic system.
Subtask 32-31-14-720-051-A (1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the safety pin from the door ground-opening handle.
(3) Put the door ground-opening handle in the open position.
(4) Install the safety pin on the handle.
(5) Make sure that the NLG door uplock assy (2534GM) is in the open configuration.
(6) Remove the container below the NLG door uplock assy (2534GM).
(7) Make sure that the travel range of the NLG doors is clean and clear of tools and other items.
(8) Remove the access platform(s).
(9) Put the green hydraulic system back to the serviceable condition (Ref. AMM TASK 29-00-00-864-001).
(10) Make sure that the Green hydraulic system is pressurized with the PTU.
(11) Adjust the hydraulic power unit for minimum pressure and flow rate.
(12) Do 5 full DOOR CLOSE/DOOR OPEN cycles (Ref. AMM TASK 32-22-00-010-001), (Ref. AMM TASK 32-22-00-410-001) to bleed the hydraulic system.
F. Functional Test
(1) Do an operational test of the landing gear doors (Ref. AMM TASK 32-31-00-710-002).
(2) Open the NLG doors (Ref. AMM TASK 32-22-00-010-001).
(3) Put the access platform in position below the NLG door uplock assy (2534GM).
(4) Make sure that there is no hydraulic fluid leakage from the NLG door uplock assy (2534GM).
(5) If necessary fill the reservoir of the Green hydraulic system to the correct level (Ref. AMM TASK 12-12-29-611-001).
5. Close-up(1) Do an operational test of the landing gear doors (Ref. AMM TASK 32-31-00-710-002).
(2) Open the NLG doors (Ref. AMM TASK 32-22-00-010-001).
(3) Put the access platform in position below the NLG door uplock assy (2534GM).
(4) Make sure that there is no hydraulic fluid leakage from the NLG door uplock assy (2534GM).
(5) If necessary fill the reservoir of the Green hydraulic system to the correct level (Ref. AMM TASK 12-12-29-611-001).
Subtask 32-31-14-410-052-A
A. Close Access
(1) Remove the WARNING NOTICE(S).
(2) Remove the access platform(s).
(3) Make sure that the work area is clean and clear of tools and other items.
(4) Close the doors of the nose landing gear (Ref. AMM TASK 32-22-00-410-001).
(1) Remove the WARNING NOTICE(S).
(2) Remove the access platform(s).
(3) Make sure that the work area is clean and clear of tools and other items.
(4) Close the doors of the nose landing gear (Ref. AMM TASK 32-22-00-410-001).