DOC AIRBUS | AMM A320FInstallation of the NLG Vent Valve
TASK 32-33-14-400-001-A
Installation of the NLG Vent Valve
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Work Zones and Access Panels
D. Expendable Parts
E. Referenced Information
3. Job Set-up
Subtask 32-33-14-860-051-A
Subtask 32-33-14-420-050-A
Subtask 32-33-14-862-050-A Subtask 32-33-14-410-050-A
[Rev.10 from 2021]
2026.04.01 00:46:33 UTC
Installation of the NLG Vent Valve
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
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 2M (6 FT) - ADJUSTABLE |
| No specific | AR | CONTAINER 5 L (1.32 USGAL) |
| No specific | AR | WARNING NOTICE(S) |
| No specific | Torque wrench: range to between 0.4 and 0.3 m.daN (35.40 and 26.55 lbf.in )  | |
| No specific | Torque wrench: range to between 0.649 and 0.531 m.daN (57.43 and 46.99 lbf.in ) | |
| No specific | Torque wrench: range to between 1.7 and 1.5 m.daN (12.54 and 11.06 lbf.ft ) | |
| No specific | Torque wrench: range to between 1.75 and 1.63 m.daN (12.91 and 12.02 lbf.ft ) | |
| No specific | Torque wrench: range to between 3.2 and 2.9 m.daN (23.60 and 21.39 lbf.ft ) | |
| No specific | Torque wrench: range to between 3.58 and 3.47 m.daN (26.40 and 25.59 lbf.ft ) | |
| 98A27901002000 | 1 | PIN-RIGGING,RUDDER CONTROL |
| 98A32301000000 | 1 | RIGGING PIN |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.03GBB1) | Synthetic Oil base Grease-General Purpose Clay Thickened - |
| (Material No.03HBD9) | Synthetic Ester base Grease-General Purpose Low Temp - |
| (Material No.12ACB1) | Corrosion Preventive Compound-Heavy Duty Hard Film - |
| No specific | corrosion resistant steel lockwire 0.6 mm (0.023 in.) dia. |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 124 | NOSE GEAR WELL |
| 197CB |
| FIG.ITEM | DESIGNATION | IPC-CSN |
|---|---|---|
| 17 | COTTER PINS | AIPC 32-33-01-06-010 |
| 27 | COTTER PIN | AIPC 32-33-01-06-050 |
| 11 | PACKING | AIPC 32-33-01-06-130 |
| 16 | PACKING | AIPC 32-33-01-06-150 |
| 21 | PACKING | AIPC 32-33-01-06-150 |
| 9 | COTTER PIN | AIPC 32-33-01-07-010 |
| 17 | COTTER PINS | AIPC 32-33-81-06-010 |
| 27 | COTTER PIN | AIPC 32-33-81-06-070 |
| 11 | PACKING | AIPC 32-33-81-06-130 |
| 16 | PACKING | AIPC 32-33-81-06-150 |
| 21 | PACKING | AIPC 32-33-81-06-150 |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 12-12-29-611-001-A | Fill the Hydraulic Fluid Reservoir with a Hand Pump |
| TASK 12-12-29-611-002-A | Fill the Hydraulic Fluid Reservoir with a Hydraulic Service Cart |
| TASK 24-42-00-861-001-A | Energize the Ground Service Network from the External Power |
| TASK 24-42-00-862-001-A | De-energize the Ground Service Network Supplied from the External Power |
| 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 32-00-00-481-001-A | Installation of the Safety Devices on the Landing Gears |
| TASK 32-00-00-481-002-A | Installation of the Safety Devices on the Landing Gear Doors |
| 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 32-33-00-720-004-A | Functional Test of the NLG Free-Fall Extension |
| TASK 12-22-00-00 | LUBRICATION - DESCRIPTION AND OPERATION |
NLG Vent Valve - AssemblySubtask 32-33-14-860-051-A
A. Aircraft Maintenance Configuration
(1) Make sure that the ground service network is energized
(Ref. AMM TASK 24-42-00-861-001).
(2) Make sure that the Green hydraulic system is depressurized and put it in the maintenance configuration.
(Ref. AMM TASK 29-00-00-864-001).
(3) Make sure that the reservoir of the Green hydraulic system is depressurized
(Ref. AMM TASK 29-14-00-614-001).
(4) Make sure that the NLG doors are open (Ref. AMM TASK 32-22-00-010-001).
(5) Make sure that the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position below the vent valve, in zone 123.
(6) Make sure that the WARNING NOTICE(S) are in position to tell persons not to pressurize the Green hydraulic system:
(8) Make sure that the safety devices are installed:
4. Procedure(1) Make sure that the ground service network is energized
(Ref. AMM TASK 24-42-00-861-001).
(2) Make sure that the Green hydraulic system is depressurized and put it in the maintenance configuration.
(Ref. AMM TASK 29-00-00-864-001).
(3) Make sure that the reservoir of the Green hydraulic system is depressurized
(Ref. AMM TASK 29-14-00-614-001).
(4) Make sure that the NLG doors are open (Ref. AMM TASK 32-22-00-010-001).
(5) Make sure that the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position below the vent valve, in zone 123.
(6) Make sure that the WARNING NOTICE(S) 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.
(8) Make sure that the safety devices are installed:
- on the Nose Landing Gear (Ref. AMM TASK 32-00-00-481-001)
- on the NLG doors (Ref. AMM TASK 32-00-00-481-002).
Subtask 32-33-14-420-050-A
A. Installation of the Vent Valve (20)
(2) Apply a thin layer of Synthetic Ester base Grease-General Purpose Low Temp - (Material No.03HBD9) or Synthetic Oil base Grease-General Purpose Clay Thickened - (Material No.03GBB1) on the fasteners.
(4) Install the washers (19) and the nuts (18).
(5) TORQUE the nuts (18) to between 0.4 and 0.3 m.daN (35.40 and 26.55 lbf.in ).
(6) Safety the nuts (18) with the new AIPC 32-33-01-06-010 COTTER PINS (17) or AIPC 32-33-81-06-010 COTTER PINS (17).
(7) Install the lever (6) on the vent valve (20).
(8) Install the bolt (10), the washer (25) and the nut (26). Tighten the nut (26) and safety it with the new AIPC 32-33-01-06-050 COTTER PIN (27) or AIPC 32-33-81-06-070 COTTER PIN (27).
(9) Install the reducer (12) with the new AIPC 32-33-01-06-130 PACKING (11) or AIPC 32-33-81-06-130 PACKING (11).
(10) TORQUE the reducer (12) to between 1.75 and 1.63 m.daN (12.91 and 12.02 lbf.ft ).
(11) Install the reducers (15) and (22) with the new AIPC 32-33-01-06-150 PACKING (16) or AIPC 32-33-81-06-150 PACKING (16) and the new AIPC 32-33-01-06-150 PACKING (21) or AIPC 32-33-81-06-150 PACKING (21).
(12) TORQUE the reducers (15) and (22) to between 3.58 and 3.47 m.daN (26.40 and 25.59 lbf.ft ).
(13) Remove the blanking plugs and connect the hydraulic lines (13), (14) and (23).
(14) TORQUE the hydraulic line (13) to between 1.7 and 1.5 m.daN (12.54 and 11.06 lbf.ft ).
(15) TORQUE the hydraulic lines (14) and (23) to between 3.2 and 2.9 m.daN (23.60 and 21.39 lbf.ft ).
Subtask 32-33-14-820-050-A WARNING:
MAKE SURE THAT THE NLG DOWNLOCK SAFETY PIN AND THE TWO DOOR SAFETY PINS ARE INSTALLED.
(1) Clean the connecting components with ACETONE (Material No. 11-583) and dry them with dry filtered compressed-air. (2) Apply a thin layer of Synthetic Ester base Grease-General Purpose Low Temp - (Material No.03HBD9) or Synthetic Oil base Grease-General Purpose Clay Thickened - (Material No.03GBB1) on the fasteners.
NOTE: For lubricant grease specification and lubrication requirements, refer to (Ref. AMM D/O 12-22-00-00).
(3) Put the vent valve (20) in position and install the bolts (24). (4) Install the washers (19) and the nuts (18).
(5) TORQUE the nuts (18) to between 0.4 and 0.3 m.daN (35.40 and 26.55 lbf.in )
. (6) Safety the nuts (18) with the new AIPC 32-33-01-06-010 COTTER PINS (17) or AIPC 32-33-81-06-010 COTTER PINS (17).
(7) Install the lever (6) on the vent valve (20).
(8) Install the bolt (10), the washer (25) and the nut (26). Tighten the nut (26) and safety it with the new AIPC 32-33-01-06-050 COTTER PIN (27) or AIPC 32-33-81-06-070 COTTER PIN (27).
(9) Install the reducer (12) with the new AIPC 32-33-01-06-130 PACKING (11) or AIPC 32-33-81-06-130 PACKING (11).
(10) TORQUE the reducer (12) to between 1.75 and 1.63 m.daN (12.91 and 12.02 lbf.ft )
. (11) Install the reducers (15) and (22) with the new AIPC 32-33-01-06-150 PACKING (16) or AIPC 32-33-81-06-150 PACKING (16) and the new AIPC 32-33-01-06-150 PACKING (21) or AIPC 32-33-81-06-150 PACKING (21).
(12) TORQUE the reducers (15) and (22) to between 3.58 and 3.47 m.daN (26.40 and 25.59 lbf.ft )
. (13) Remove the blanking plugs and connect the hydraulic lines (13), (14) and (23).
(14) TORQUE the hydraulic line (13) to between 1.7 and 1.5 m.daN (12.54 and 11.06 lbf.ft )
. (15) TORQUE the hydraulic lines (14) and (23) to between 3.2 and 2.9 m.daN (23.60 and 21.39 lbf.ft )
. B. Adjustment of the Mechanical Linkage
(1) Install the 98A32301000000 RIGGING PIN (28) in the lever (6).
(2) Install the 98A27901002000 PIN-RIGGING,RUDDER CONTROL (29) in the output bellcrank of the mechanical assembly of the free-fall actuator support. This is to make sure that the mechanical linkage is in the 0 position.
(3) Engage the rod (4) in the fork of the lever (6) and make sure that the holes are aligned.
Adjust the length of the rod if necessary:
(a) Cut and discard the lockwire from the nuts (2) at the two ends of the rod (4).
(b) Loosen the nuts (2).
(c) Release the washers (3) and turn the rod (4) until the holes are aligned.
(d) TORQUE the nuts (2) to between 0.649 and 0.531 m.daN (57.43 and 46.99 lbf.in ).
(e) Safety the nuts (2) with corrosion resistant steel lockwire 0.6 mm (0.023 in.) dia..
(4) Install the bolt (5), the washer (7) and the nut (8) and tighten.
(5) Safety the nut (8) with a AIPC 32-33-01-07-010 COTTER PIN (9).
(6) Remove the 98A32301000000 RIGGING PIN (28).
(7) Remove the 98A27901002000 PIN-RIGGING,RUDDER CONTROL (29).
(8) Make sure that all the control linkage components are free and do not rub against the adjacent control structures.
Subtask 32-33-14-914-050-A (1) Install the 98A32301000000 RIGGING PIN (28) in the lever (6).
(2) Install the 98A27901002000 PIN-RIGGING,RUDDER CONTROL (29) in the output bellcrank of the mechanical assembly of the free-fall actuator support. This is to make sure that the mechanical linkage is in the 0 position.
(3) Engage the rod (4) in the fork of the lever (6) and make sure that the holes are aligned.
Adjust the length of the rod if necessary:
(a) Cut and discard the lockwire from the nuts (2) at the two ends of the rod (4).
(b) Loosen the nuts (2).
(c) Release the washers (3) and turn the rod (4) until the holes are aligned.
(d) TORQUE the nuts (2) to between 0.649 and 0.531 m.daN (57.43 and 46.99 lbf.in )
. (e) Safety the nuts (2) with corrosion resistant steel lockwire 0.6 mm (0.023 in.) dia..
(4) Install the bolt (5), the washer (7) and the nut (8) and tighten.
(5) Safety the nut (8) with a AIPC 32-33-01-07-010 COTTER PIN (9).
(6) Remove the 98A32301000000 RIGGING PIN (28).
(7) Remove the 98A27901002000 PIN-RIGGING,RUDDER CONTROL (29).
(8) Make sure that all the control linkage components are free and do not rub against the adjacent control structures.
C. Apply Corrosion Preventive Compound-Heavy Duty Hard Film - (Material No.12ACB1) to the bolt (24), the washer (19) and the nut (18).
Subtask 32-33-14-942-051-A D. Preparation for the Test
(1) Remove the container.
(2) Remove the access platform(s).
(3) Close the NLG doors (Ref. AMM TASK 32-22-00-410-001).
(4) Remove the WARNING NOTICE(S).
Subtask 32-33-14-720-050-A (1) Remove the container.
(2) Remove the access platform(s).
(3) Close the NLG doors (Ref. AMM TASK 32-22-00-410-001).
(4) Remove the WARNING NOTICE(S).
E. Test of the Vent Valve (20)
(1) Do the functional test of the NLG free fall extension (Ref. AMM TASK 32-33-00-720-004).
(2) Open the NLG doors (Ref. AMM TASK 32-22-00-010-001).
(3) Put the access platform in position below the NLG vent valve (2532GM), in zone 123.
(4) Make sure that there is no hydraulic fluid leakage from the vent valve (2532GM).
(5) If necessary fill the reservoir of the Green hydraulic system to the correct level (Ref. AMM TASK 12-12-29-611-001) or (Ref. AMM TASK 12-12-29-611-002).
5. Close-up(1) Do the functional test of the NLG free fall extension (Ref. AMM TASK 32-33-00-720-004).
(2) Open the NLG doors (Ref. AMM TASK 32-22-00-010-001).
(3) Put the access platform in position below the NLG vent valve (2532GM), in zone 123.
(4) Make sure that there is no hydraulic fluid leakage from the vent valve (2532GM).
(5) If necessary fill the reservoir of the Green hydraulic system to the correct level (Ref. AMM TASK 12-12-29-611-001) or (Ref. AMM TASK 12-12-29-611-002).
Subtask 32-33-14-862-050-A Subtask 32-33-14-410-050-A
B. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the access platform(s).
(3) Close the NLG doors (Ref. AMM TASK 32-22-00-410-001).
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the access platform(s).
(3) Close the NLG doors (Ref. AMM TASK 32-22-00-410-001).