DOC AIRBUS | AMM A320FInstallation of the NLG Lock Springs
TASK 32-21-18-400-001-A
Installation of the NLG Lock Springs
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Expendable Parts
D. Referenced Information
3. Job Set-up
Subtask 32-21-18-860-050-A
Subtask 32-21-18-110-050-B
Subtask 32-21-18-410-051-A
[Rev.10 from 2021]
2026.04.01 00:42:21 UTC
Installation of the NLG Lock Springs
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 | WARNING NOTICE(S) |
| No specific | Torque wrench: range to between 0.95 and 0.8 m.daN (84.07 and 70.80 lbf.in )  | |
| M21929 | 2 | TENSIONING FIXTURE |
| 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.06ABA1) | Polysulfide Sealant-Fuel Tank Brushable - |
| (Material No.06LDG2) | Non Hardening Jointing Putty-High Temp. Area - Structure |
| (Material No.08BAA9) | Non Aqueous Cleaner-General - - |
| FIG.ITEM | DESIGNATION | IPC-CSN |
|---|---|---|
| 15 | COTTER PIN | AIPC 32-21-11-22-010 |
| 21 | COTTER PIN | AIPC 32-21-11-22-010 |
| 15 | COTTER PIN | AIPC 32-21-11-42-010 |
| 21 | COTTER PIN | AIPC 32-21-11-42-010 |
| 15 | COTTER PIN | AIPC 32-21-11-62-010 |
| 21 | COTTER PIN | AIPC 32-21-11-62-010 |
| 15 | COTTER PIN | AIPC 32-21-11-82-010 |
| 21 | COTTER PIN | AIPC 32-21-11-82-010 |
| 1 | COTTER PIN | AIPC 32-21-17-02-010 |
| 14 | COTTER PIN | AIPC 32-21-17-02-010 |
| 6 | WASHER | AIPC 32-21-17-02-040 |
| 9 | WASHER | AIPC 32-21-17-02-040 |
| REFERENCE | DESIGNATION |
|---|---|
| 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 12-22-00-00 | LUBRICATION - DESCRIPTION AND OPERATION |
NLG Lock SpringsSubtask 32-21-18-860-050-A
A. Aircraft Maintenance Configuration
(1) 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.
(2) Make sure that the doors of the nose landing gear are open (Ref. AMM TASK 32-22-00-010-001).
4. Procedure(1) 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.
(2) Make sure that the doors of the nose landing gear are open (Ref. AMM TASK 32-22-00-010-001).
Subtask 32-21-18-110-050-B
A. Preparation for Installation
(1) Clean the attachment hardware and the pins (18) and (22) with Non Aqueous Cleaner-General - - (Material No.08BAA9) , and dry them with filtered compressed air.
(2) Apply a light layer of Non Hardening Jointing Putty-High Temp. Area - Structure (Material No.06LDG2) to the threads of all the nuts, screws, bolts and pins.
(3) Lubricate the hardware and the pins (18) and (22) with Synthetic Ester base Grease-General Purpose Low Temp - (Material No.03HBD9) or Synthetic Oil base Grease-General Purpose Clay Thickened - (Material No.03GBB1) .
Subtask 32-21-18-420-053-B ** ON A/C NOT FOR ALL (1) Clean the attachment hardware and the pins (18) and (22) with Non Aqueous Cleaner-General - - (Material No.08BAA9) , and dry them with filtered compressed air.
(2) Apply a light layer of Non Hardening Jointing Putty-High Temp. Area - Structure (Material No.06LDG2) to the threads of all the nuts, screws, bolts and pins.
(3) Lubricate the hardware and the pins (18) and (22) with Synthetic Ester base Grease-General Purpose Low Temp - (Material No.03HBD9) or Synthetic Oil base Grease-General Purpose Clay Thickened - (Material No.03GBB1) .
NOTE: For lubricant grease specification and lubrication requirements, refer to (Ref. AMM D/O 12-22-00-00).
B. Installation of the NLG Lock Springs
(1) Install the M21929 TENSIONING FIXTURE (25) on the springs (4) and (11) on each end-fitting.
(2) Make sure that the brackets (7) and (8) are in position.
(3) Remove the washers (6) and (9).
(4) Put the lock springs (4) and (11) in position with the coils at the bottom part and install the washers (3), (5), (10) and (12), the nuts (2) and (13).
(5) Measure the clearance on each side and use the new AIPC 32-21-17-02-040 WASHER (6) and the AIPC 32-21-17-02-040 WASHER (9) to get a clearance between 0.05 mm (0.0020 in.) and 0.5 mm (0.0197 in.).
(7) Install the washers (6), (9), (5) and (10), the lock springs (4) and (11) and the washers (3) and (12).
(8) Install the nuts (2) and (13) and TORQUE them to between 0.95 and 0.8 m.daN (84.07 and 70.80 lbf.in ).
(9) Install the new AIPC 32-21-17-02-010 COTTER PIN (1).
(10) Install the new AIPC 32-21-17-02-010 COTTER PIN (14).
(12) Install the washers (19) and (17).
(13) Install the nuts (20) and (16) and TORQUE them to between 0.95 and 0.8 m.daN (84.07 and 70.80 lbf.in ).
(14) Install the new AIPC 32-21-11-42-010 COTTER PIN (15) or AIPC 32-21-11-62-010 COTTER PIN (15) or AIPC 32-21-11-82-010 COTTER PIN (15).
(15) Install the new AIPC 32-21-11-42-010 COTTER PIN (21) or AIPC 32-21-11-62-010 COTTER PIN (21) or AIPC 32-21-11-82-010 COTTER PIN (21).
(16) Remove the M21929 TENSIONING FIXTURE (25) from the lock springs (4) and (11).
(17) Apply Polysulfide Sealant-Fuel Tank Brushable - (Material No.06ABA1) on the zones E.
Subtask 32-21-18-420-053-C ** ON A/C NOT FOR ALL (1) Install the M21929 TENSIONING FIXTURE (25) on the springs (4) and (11) on each end-fitting.
(2) Make sure that the brackets (7) and (8) are in position.
(3) Remove the washers (6) and (9).
(4) Put the lock springs (4) and (11) in position with the coils at the bottom part and install the washers (3), (5), (10) and (12), the nuts (2) and (13).
(5) Measure the clearance on each side and use the new AIPC 32-21-17-02-040 WASHER (6) and the AIPC 32-21-17-02-040 WASHER (9) to get a clearance between 0.05 mm (0.0020 in.) and 0.5 mm (0.0197 in.).
NOTE: You must use between one and three adjustment washers (6) and (9) on each side.
(6) Remove the nuts (2) and (13), the washers (3) and (12), the lock springs (4) and (11), the washers (5) and (10). (7) Install the washers (6), (9), (5) and (10), the lock springs (4) and (11) and the washers (3) and (12).
(8) Install the nuts (2) and (13) and TORQUE them to between 0.95 and 0.8 m.daN (84.07 and 70.80 lbf.in )
. (9) Install the new AIPC 32-21-17-02-010 COTTER PIN (1).
(10) Install the new AIPC 32-21-17-02-010 COTTER PIN (14).
NOTE: You must adjust the length of the lock springs with the tool as necessary to install them.
(11) Install the lock springs (4) and (11). (12) Install the washers (19) and (17).
(13) Install the nuts (20) and (16) and TORQUE them to between 0.95 and 0.8 m.daN (84.07 and 70.80 lbf.in )
. (14) Install the new AIPC 32-21-11-42-010 COTTER PIN (15) or AIPC 32-21-11-62-010 COTTER PIN (15) or AIPC 32-21-11-82-010 COTTER PIN (15).
(15) Install the new AIPC 32-21-11-42-010 COTTER PIN (21) or AIPC 32-21-11-62-010 COTTER PIN (21) or AIPC 32-21-11-82-010 COTTER PIN (21).
(16) Remove the M21929 TENSIONING FIXTURE (25) from the lock springs (4) and (11).
(17) Apply Polysulfide Sealant-Fuel Tank Brushable - (Material No.06ABA1) on the zones E.
B. Installation of the NLG Lock Springs
(1) Install the M21929 TENSIONING FIXTURE on the springs (4) and (11).
(2) Make sure that the brackets (7) and (8) are in position.
(3) Remove the washers (6) and (9).
(4) Put the lock springs (4) and (11) in position with the coils at the bottom part and install the washers (3), (5), (10) and (12), the nuts (2) and (13).
(5) Measure the clearance on each side and use the new AIPC 32-21-17-02-040 WASHER (6) and the AIPC 32-21-17-02-040 WASHER (9) to get a clearance between 0.05 mm (0.0020 in.) and 0.5 mm (0.0197 in.).
(7) Install the washers (6), (9), (5) and (10), the springs (4) and (11) and the washers (3) and (12).
(8) Install the nuts (2) and (13) and TORQUE them to between 0.95 and 0.8 m.daN (84.07 and 70.80 lbf.in ).
(9) Install the new AIPC 32-21-17-02-010 COTTER PIN (1).
(10) Install the new AIPC 32-21-17-02-010 COTTER PIN (14).
(11) Install the springs (4) and (11).
(12) Install the washers (19) and (17).
(13) Install the nuts (20) and (16) and TORQUE them to between 0.95 and 0.8 m.daN (84.07 and 70.80 lbf.in ).
(14) Install the new AIPC 32-21-11-42-010 COTTER PIN (15) or AIPC 32-21-11-22-010 COTTER PIN (15).
(15) Install the new AIPC 32-21-11-42-010 COTTER PIN (21) or AIPC 32-21-11-22-010 COTTER PIN (21).
(16) Remove the M21929 TENSIONING FIXTURE from the springs (4) and (11).
(17) Apply Polysulfide Sealant-Fuel Tank Brushable - (Material No.06ABA1) on the zones E.
5. Close-up(1) Install the M21929 TENSIONING FIXTURE on the springs (4) and (11).
(2) Make sure that the brackets (7) and (8) are in position.
(3) Remove the washers (6) and (9).
(4) Put the lock springs (4) and (11) in position with the coils at the bottom part and install the washers (3), (5), (10) and (12), the nuts (2) and (13).
(5) Measure the clearance on each side and use the new AIPC 32-21-17-02-040 WASHER (6) and the AIPC 32-21-17-02-040 WASHER (9) to get a clearance between 0.05 mm (0.0020 in.) and 0.5 mm (0.0197 in.).
NOTE: You must use between one and three adjustment washers (6) and (9) on each side.
(6) Remove the nuts (2) and (13), the washers (3) and (12), the lock springs (4) and (11), the washers (5) and (10). (7) Install the washers (6), (9), (5) and (10), the springs (4) and (11) and the washers (3) and (12).
(8) Install the nuts (2) and (13) and TORQUE them to between 0.95 and 0.8 m.daN (84.07 and 70.80 lbf.in )
. (9) Install the new AIPC 32-21-17-02-010 COTTER PIN (1).
(10) Install the new AIPC 32-21-17-02-010 COTTER PIN (14).
(11) Install the springs (4) and (11).
(12) Install the washers (19) and (17).
(13) Install the nuts (20) and (16) and TORQUE them to between 0.95 and 0.8 m.daN (84.07 and 70.80 lbf.in )
. (14) Install the new AIPC 32-21-11-42-010 COTTER PIN (15) or AIPC 32-21-11-22-010 COTTER PIN (15).
(15) Install the new AIPC 32-21-11-42-010 COTTER PIN (21) or AIPC 32-21-11-22-010 COTTER PIN (21).
(16) Remove the M21929 TENSIONING FIXTURE from the springs (4) and (11).
(17) Apply Polysulfide Sealant-Fuel Tank Brushable - (Material No.06ABA1) on the zones E.
Subtask 32-21-18-410-051-A
A. Get Access
(1) Remove the WARNING NOTICE(S).
(2) Make sure that the work area is clean and clear of tools and other items.
(3) Close the doors of the nose landing gear (Ref. AMM TASK 32-22-00-410-001).
(1) Remove the WARNING NOTICE(S).
(2) Make sure that the work area is clean and clear of tools and other items.
(3) Close the doors of the nose landing gear (Ref. AMM TASK 32-22-00-410-001).