DOC AIRBUS | AMM A320FInstallation of the NLG Shock Absorber Assy (with nose jacking only)
TASK 32-21-13-400-001-B-01
Installation of the NLG Shock Absorber Assy (with nose jacking only)
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 32-21-13-860-063-A ** ON A/C NOT FOR ALL
Subtask 32-21-13-410-055-B ** ON A/C NOT FOR ALL
Subtask 32-21-13-860-065-A ** ON A/C NOT FOR ALL
[Rev.9 from 2019]
2026.04.01 00:42:12 UTC
Installation of the NLG Shock Absorber Assy (with nose jacking only)
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 FLIGHT CONTROLS SURFACES ARE CLEAR. MOVEMENT OF FLIGHT CONTROLS CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.
WARNING:
MAKE SURE THAT THE CONTROLS AGREE WITH THE POSITION OF THE ITEMS THEY OPERATE BEFORE YOU PRESSURIZE A HYDRAULIC SYSTEM. UNWANTED MOVEMENT OF HYDRAULICALLY OPERATED ITEMS CAN CAUSE SERIOUS INJURY AND/OR DAMAGE.
WARNING:
PRESSURIZE ONLY THE HYDRAULIC SYSTEM(S) THAT IS (ARE) NECESSARY FOR THE TASK. ISOLATE THE OTHER HYDRAULIC SYSTEM(S) BEFORE YOU SUPPLY HYDRAULIC POWER TO THE AIRCRAFT.
WARNING:
MAKE SURE THAT ALL THE CIRCUITS IN MAINTENANCE ARE ISOLATED BEFORE YOU SUPPLY ELECTRICAL POWER TO THE AIRCRAFT. UNWANTED ELECTRICAL POWER CAN BE DANGEROUS.
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 | SAFETY BARRIER(S) |
| No specific | AR | STRAP-RATCHET |
| No specific | AR | WARNING NOTICE(S) |
| No specific | Torque wrench: range to between 0.35 and 0.25 m.daN (30.97 and 22.12 lbf.in )  | |
| No specific | Torque wrench: range to between 1.25 and 1 m.daN (110.62 and 88.50 lbf.in ) | |
| No specific | Torque wrench: range to between 2.0 and 1.7 m.daN (14.75 and 12.54 lbf.ft ) | |
| No specific | Torque wrench: range to between 25 and 22 m.daN (184.37 and 162.24 lbf.ft ) | |
| J47564 | 1 | ADAPTOR |
| J47999 | 1 | GUIDE CONE |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.06ABA1) | Polysulfide Sealant-Fuel Tank Brushable - |
| (Material No.06ABB1) | Polysulfide Sealant-Fuel Tank Fillet - |
| (Material No.06LDG2) | Non Hardening Jointing Putty-High Temp. Area - Structure |
| (Material No.08ABC1) | Aqueous Cleaner-Aircraft Exterior Pressure Spraying - |
| (Material No.08BBF1) | Non Aqueous Cleaner-- Methyl-Ethyl-Ketone - |
| (Material No.14QFB1) | Wire-Locking Dia: 0.8 mm CRES Nickel Alloy - |
| FIG.ITEM | DESIGNATION | IPC-CSN |
|---|---|---|
| 22 | COTTER PIN | AIPC 32-21-11-21-010 |
| 15 | SCRAPER | AIPC 32-21-11-23-230 |
| 12 | RING | AIPC 32-21-11-23-250 |
| 13 | SEAL | AIPC 32-21-11-23-260 |
| 22 | COTTER PIN | AIPC 32-21-11-41-010 |
| 15 | SCRAPER | AIPC 32-21-11-43-230 |
| 12 | RING | AIPC 32-21-11-43-250 |
| 13 | SEAL | AIPC 32-21-11-43-260 |
| 22 | COTTER PIN | AIPC 32-21-11-61-010 |
| 15 | SCRAPER | AIPC 32-21-11-63-230 |
| 12 | RING | AIPC 32-21-11-63-250 |
| 13 | SEAL | AIPC 32-21-11-63-260 |
| 22 | COTTER PIN | AIPC 32-21-11-81-010 |
| 15 | SCRAPER | AIPC 32-21-11-83-230 |
| 12 | RING | AIPC 32-21-11-83-250 |
| 13 | SEAL | AIPC 32-21-11-83-260 |
| 5 | PACKING | AIPC 32-21-13-11-110 |
| 5 | PACKING | AIPC 32-21-13-21-110 |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 07-11-00-586-001-A | Lowering of the Aircraft at Forward Jacking Point, MLG Wheels on the Ground |
| TASK 12-12-32-611-005-A | NLG Shock Absorber Oil Replenishment and Nitrogen Filling (Aircraft on Jacks) |
| TASK 12-14-32-614-004-A | Check NLG Shock Absorber Charge Pressure |
| TASK 12-22-32-640-002-A | Lubrication of Nose Landing Gear and Doors |
| 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 32-21-18-400-001-A | Installation of the NLG Lock Springs |
| TASK 32-21-27-400-001-A | Installation of the Torque Link Assy |
| TASK 32-21-27-400-002-A | Installation of the Torque-Link Center Hinge |
| 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 32-31-00-720-003-A | Functional Test of the Normal Extension and Retraction of the Nose Landing Gear |
| TASK 32-41-12-400-001-A | Installation of the NLG Wheel |
| TASK 32-51-00-720-003-A | Functional Test of the Nose Wheel Steering with the Handwheel |
| TASK 33-46-12-400-001-A | Installation of the Taxi Light |
NLG Shock Absorber AssySubtask 32-21-13-860-063-A ** ON A/C NOT FOR ALL
A. Safety Precautions
(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) On the steering handwheel (CAPT and F/O) and on the brake pedals, make sure that the WARNING NOTICE(S) is (are) in position to tell persons not to operate them.
(3) Make sure that the SAFETY BARRIER(S) are in position.
(4) Make sure that the doors of the nose landing gear are open (Ref. AMM TASK 32-22-00-010-001).
(5) Make sure that the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position in zone 123.
Subtask 32-21-13-865-063-A ** ON A/C NOT FOR ALL (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) On the steering handwheel (CAPT and F/O) and on the brake pedals, make sure that the WARNING NOTICE(S) is (are) in position to tell persons not to operate them.
(3) Make sure that the SAFETY BARRIER(S) are in position.
(4) Make sure that the doors of the nose landing gear are open (Ref. AMM TASK 32-22-00-010-001).
(5) Make sure that the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position in zone 123.
B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:
Subtask 32-21-13-860-064-A ** ON A/C NOT FOR ALL | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 49VU | L/G/LGCIU/SYS1/NORM | 1GA | C09 |
| 121VU | HYDRAULIC/BRAKING AND STEERING/SYS2/SPLY | 4GG | M36 |
| 121VU | HYDRAULIC/BRAKING AND STEERING/SYS2/CTL | 3GG | M35 |
| 121VU | HYDRAULIC/BRAKING AND STEERING/SYS1/CTL | 1GG | M34 |
| 121VU | HYDRAULIC/BRAKING AND STEERING/SYS1/IND AND/SPLY | 2GG | M33 |
| 121VU | HYDRAULIC/LGCIU/SYS2 | 2GA | Q35 |
| 121VU | HYDRAULIC/LGCIU/SYS1/GRND SPLY | 52GA | Q34 |
C. 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)
(3) Make sure that the Yellow hydraulic system is depressurized and put it in the maintenance configuration.
(Ref. AMM TASK 29-00-00-864-001).
(4) Depressurize the reservoir of the Yellow hydraulic system.
(Ref. AMM TASK 29-14-00-614-001).
4. Procedure(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)
(3) Make sure that the Yellow hydraulic system is depressurized and put it in the maintenance configuration.
(Ref. AMM TASK 29-00-00-864-001).
(4) Depressurize the reservoir of the Yellow hydraulic system.
(Ref. AMM TASK 29-14-00-614-001).
Subtask 32-21-13-410-055-B ** ON A/C NOT FOR ALL
A. Preparation for Installation
(1) Clean all the removed parts with Aqueous Cleaner-Aircraft Exterior Pressure Spraying - (Material No.08ABC1) and dry them with compressed air.
(2) Make sure that the parts and the chromed surfaces are in the correct condition.
(3) Make sure that the three friction pads (11) are in position in the upper part of the shock strut (7).
(4) Make sure that the scraper (14) is in the correct condition. Replace the AIPC 32-21-11-43-230 SCRAPER (15) or AIPC 32-21-11-23-230 SCRAPER (15) or AIPC 32-21-11-63-230 SCRAPER (15) or AIPC 32-21-11-23-230 SCRAPER (15) or AIPC 32-21-11-83-230 SCRAPER (15) or AIPC 32-21-11-23-230 SCRAPER (15) if necessary.
(5) To prevent damage to the scraper (14) during installation, install it on the shock absorber (10). You will push the scraper (14) in its housing when you engage the shock absorber (10) in the upper bearing.
(6) Systematically replace the AIPC 32-21-11-43-260 SEAL (13) or AIPC 32-21-11-23-260 SEAL (13) or AIPC 32-21-11-63-260 SEAL (13) or AIPC 32-21-11-23-260 SEAL (13) or AIPC 32-21-11-83-260 SEAL (13) or AIPC 32-21-11-23-260 SEAL (13) and the AIPC 32-21-11-43-250 RING (12) or AIPC 32-21-11-23-250 RING (12) or AIPC 32-21-11-63-250 RING (12) or AIPC 32-21-11-23-250 RING (12) or AIPC 32-21-11-83-250 RING (12) or AIPC 32-21-11-23-250 RING (12).
(7) Clean the attachment hardware with Non Aqueous Cleaner-- Methyl-Ethyl-Ketone - (Material No.08BBF1) and dry them with filtered compressed air.
(8) Apply a light coat of Non Hardening Jointing Putty-High Temp. Area - Structure (Material No.06LDG2) to the threads of all the nuts, screws, bolts and pins.
(9) Apply a light layer of Non Hardening Jointing Putty-High Temp. Area - Structure (Material No.06LDG2) to the threaded parts and the stop plate (4).
(10) Apply a light layer of Non Hardening Jointing Putty-High Temp. Area - Structure (Material No.06LDG2) to the lugs of the shock absorber upper part.
Subtask 32-21-13-420-061-B ** ON A/C NOT FOR ALL (1) Clean all the removed parts with Aqueous Cleaner-Aircraft Exterior Pressure Spraying - (Material No.08ABC1) and dry them with compressed air.
(2) Make sure that the parts and the chromed surfaces are in the correct condition.
(3) Make sure that the three friction pads (11) are in position in the upper part of the shock strut (7).
(4) Make sure that the scraper (14) is in the correct condition. Replace the AIPC 32-21-11-43-230 SCRAPER (15) or AIPC 32-21-11-23-230 SCRAPER (15) or AIPC 32-21-11-63-230 SCRAPER (15) or AIPC 32-21-11-23-230 SCRAPER (15) or AIPC 32-21-11-83-230 SCRAPER (15) or AIPC 32-21-11-23-230 SCRAPER (15) if necessary.
(5) To prevent damage to the scraper (14) during installation, install it on the shock absorber (10). You will push the scraper (14) in its housing when you engage the shock absorber (10) in the upper bearing.
(6) Systematically replace the AIPC 32-21-11-43-260 SEAL (13) or AIPC 32-21-11-23-260 SEAL (13) or AIPC 32-21-11-63-260 SEAL (13) or AIPC 32-21-11-23-260 SEAL (13) or AIPC 32-21-11-83-260 SEAL (13) or AIPC 32-21-11-23-260 SEAL (13) and the AIPC 32-21-11-43-250 RING (12) or AIPC 32-21-11-23-250 RING (12) or AIPC 32-21-11-63-250 RING (12) or AIPC 32-21-11-23-250 RING (12) or AIPC 32-21-11-83-250 RING (12) or AIPC 32-21-11-23-250 RING (12).
(7) Clean the attachment hardware with Non Aqueous Cleaner-- Methyl-Ethyl-Ketone - (Material No.08BBF1) and dry them with filtered compressed air.
(8) Apply a light coat of Non Hardening Jointing Putty-High Temp. Area - Structure (Material No.06LDG2) to the threads of all the nuts, screws, bolts and pins.
(9) Apply a light layer of Non Hardening Jointing Putty-High Temp. Area - Structure (Material No.06LDG2) to the threaded parts and the stop plate (4).
(10) Apply a light layer of Non Hardening Jointing Putty-High Temp. Area - Structure (Material No.06LDG2) to the lugs of the shock absorber upper part.
B. Installation of the Shock Absorber Assy
(2) Install the J47999 GUIDE CONE on the threaded part of the sliding tube.
(3) Make sure that the bush (9) is in position on the shock absorber (10).
(4) Slowly engage the shock absorber (10) in the shock strut (7). Be careful not to cause damage to the friction pads (11) when the shock absorber (10) goes near the upper self-aligning bearing.
(5) Push the scraper (14) in its housing.
(6) Lift the shock absorber (10) so as to align the lugs of the cylinder with the slots in the shock-strut backplate (8).
(7) Hold the shock absorber.
(a) Measure the length of the thread (15) from the top of the bush (9) to the end of the thread (15). When the length is between 18 mm (0.71 in.) and 20 mm (0.79 in.), the shock absorber (10) is correctly installed in the shock strut (7).
(9) Install the nut (6) as to get contact between the shock absorber (10) and the upper support.
(10) Lower the NLG leg by operating the mini-hoist until the NLG leg is downlocked.
(11) Pull down the NLG lockstay assy (33) and insert the safety pin on the NLG lockstay assy (33).
(12) Tighten the nut (6) with the J47564 ADAPTOR to between 25 and 22 m.daN (184.37 and 162.24 lbf.ft ).
(13) Install the charging valve:
(a) Install the stop plate (4).
(b) Install the valve (1) with a new AIPC 32-21-13-11-110 PACKING (5) or AIPC 32-21-13-21-110 PACKING (5).
(c) TORQUE the valve (1) to between 1.25 and 1 m.daN (110.62 and 88.50 lbf.in ) and safety with 14QFB1 Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -
(d) Install the washer (3) and the screw (2).
(e) TORQUE the screw (2) to between 0.35 and 0.25 m.daN (30.97 and 22.12 lbf.in ).
(14) Remove the HOIST 500 KG (1100 LB) and the straps and pay attention to slow down the extension of the shock absorber (10).
(15) Do the replenishment of the NLG shock absorber (10) (Ref. AMM TASK 12-12-32-611-005).
(16) Pressurize the shock absorber (10) with nitrogen to slowly extend the shock absorber (10) and to make sure that the cams are engaged (Ref. AMM TASK 12-14-32-614-004).
(17) With the shock absorber (10) fully extended, make sure that the wheel axle is perpendicular to the aircraft centerline.
(18) Try to turn the NLG shock absorber (10) around its vertical axis to make sure that the anti-rotation lugs are engaged in the slots of the back plate (8):
(a) The shock absorber (10) must not turn.
(b) If you can turn the shock absorber (10), this shows that the anti-rotation lugs are not correctly engaged in the slots. You must remove the shock absorber (10) to re-install the lugs in the correct position.
(19) Install the casing (18) on the axle.
(20) Install the torque link lower arm (Ref. AMM TASK 32-21-27-400-001).
Subtask 32-21-13-420-062-A ** ON A/C NOT FOR ALL WARNING:
BE CAREFUL WHEN YOU DO WORK ON THE NLG SHOCK ABSORBER. THE NLG SHOCK ABSORBER IS VERY HEAVY (AROUND 60KG), AND A MINIMUM OF THREE PERSONS IS NECESSARY TO MOVE IT. IF THE NLG SHOCK ABSORBER FALLS, IT CAN CAUSE INJURY TO PERSONNEL AND DAMAGE TO EQUIPMENT.
CAUTION:
WHEN YOU INSTALL THE SHOCK ABSORBER, MAKE SURE THAT YOU ALIGN THE PISTON LUGS WITH THE SLOTS IN THE SHOCK STRUT BACKPLATE. THE SHOCK ABSORBER WILL THUS BE IN THE CORRECT POSITION (THE WHEEL AXLE PERPENDICULAR TO THE AIRCRAFT CENTERLINE). AN INCORRECT INSTALLATION CAN CAUSE IMPORTANT DAMAGE TO THE NLG.
CAUTION:
BEFORE YOU INSTALL THE STRAPS AND THEIR PROTECTION, MAKE SURE THAT THE PARTS ARE CLEAN AND DRY. THIS IS TO PREVENT ABRASIVE EFFECTS ON THE PAINT.
CAUTION:
WHEN YOU INSTALL THE STRAPS, MAKE SURE THAT THERE IS A BLISTER PACK BETWEEN EACH STRAP AND THE PART. THIS IS TO PREVENT DAMAGE OR CHAFFING ON THE PAINT.
(1) If necessary, release the nitrogen pressure and fully compress the shock absorber (10). (2) Install the J47999 GUIDE CONE on the threaded part of the sliding tube.
(3) Make sure that the bush (9) is in position on the shock absorber (10).
(4) Slowly engage the shock absorber (10) in the shock strut (7). Be careful not to cause damage to the friction pads (11) when the shock absorber (10) goes near the upper self-aligning bearing.
(5) Push the scraper (14) in its housing.
(6) Lift the shock absorber (10) so as to align the lugs of the cylinder with the slots in the shock-strut backplate (8).
(7) Hold the shock absorber.
CAUTION:
MAKE SURE THAT YOU INSTALL THE STRAP BETWEEN THE HYDRAULIC PIPE AND THE STEERING ACTUATOR, AND NOT ON TOP OF THE PIPE. THIS IS TO PREVENT DAMAGE TO THE PIPE.
(a) Place 1500 mm (59.0552 in.) STRAP-RATCHET between the towing bar (42) and the steering actuator (41) as close as possible of the barrel to hold the shock absorber (10). Hang moderately the strap. NOTE: Position the strap near the barrel as much as possible to avoid side loads to be transmitted onto the steering actuator.
(8) Remove the J47999 GUIDE CONE from the threaded part of the sliding tube. (a) Measure the length of the thread (15) from the top of the bush (9) to the end of the thread (15). When the length is between 18 mm (0.71 in.) and 20 mm (0.79 in.), the shock absorber (10) is correctly installed in the shock strut (7).
(9) Install the nut (6) as to get contact between the shock absorber (10) and the upper support.
(10) Lower the NLG leg by operating the mini-hoist until the NLG leg is downlocked.
(11) Pull down the NLG lockstay assy (33) and insert the safety pin on the NLG lockstay assy (33).
(12) Tighten the nut (6) with the J47564 ADAPTOR to between 25 and 22 m.daN (184.37 and 162.24 lbf.ft )
. (13) Install the charging valve:
(a) Install the stop plate (4).
(b) Install the valve (1) with a new AIPC 32-21-13-11-110 PACKING (5) or AIPC 32-21-13-21-110 PACKING (5).
(c) TORQUE the valve (1) to between 1.25 and 1 m.daN (110.62 and 88.50 lbf.in )
and safety with (d) Install the washer (3) and the screw (2).
(e) TORQUE the screw (2) to between 0.35 and 0.25 m.daN (30.97 and 22.12 lbf.in )
. (14) Remove the HOIST 500 KG (1100 LB) and the straps and pay attention to slow down the extension of the shock absorber (10).
(15) Do the replenishment of the NLG shock absorber (10) (Ref. AMM TASK 12-12-32-611-005).
(16) Pressurize the shock absorber (10) with nitrogen to slowly extend the shock absorber (10) and to make sure that the cams are engaged (Ref. AMM TASK 12-14-32-614-004).
(17) With the shock absorber (10) fully extended, make sure that the wheel axle is perpendicular to the aircraft centerline.
NOTE: In the fully extended position of the shock absorber (10), the NLG is automatically centered (the nose wheel steering is in zero position).
(a) Make sure that the dimension H of the extended part of the NLG sliding tube between the lower area of the NLG lower bearing and the upper surface of the towing fitting lug is between 454.6 mm (17.8976 in.) and 445.6 mm (17.5433 in.). (18) Try to turn the NLG shock absorber (10) around its vertical axis to make sure that the anti-rotation lugs are engaged in the slots of the back plate (8):
(a) The shock absorber (10) must not turn.
(b) If you can turn the shock absorber (10), this shows that the anti-rotation lugs are not correctly engaged in the slots. You must remove the shock absorber (10) to re-install the lugs in the correct position.
(19) Install the casing (18) on the axle.
(20) Install the torque link lower arm (Ref. AMM TASK 32-21-27-400-001).
NOTE: Make sure that there are no hard points when you moved the torque links through their full travel.
(21) Connect the center hinge (Ref. AMM TASK 32-21-27-400-002). C. End of the Installation
(1) Install lock springs (31) and (32) on the lower end (Ref. AMM TASK 32-21-18-400-001).
(2) Install the taxi light (8LR) (Ref. AMM TASK 33-46-12-400-001).
(3) Install the actuating cylinder on the lower end:
(a) Engage the spherical end of the actuating cylinder (29) on pin (30).
(c) Install the bush (25), bolt (28), washers (24) and (27) with the nut (23).
(d) TORQUE the nut (23) to between 2.0 and 1.7 m.daN (14.75 and 12.54 lbf.ft ) and safety it with a new AIPC 32-21-11-41-010 COTTER PIN (22) or AIPC 32-21-11-21-010 COTTER PIN (22) or AIPC 32-21-11-61-010 COTTER PIN (22) or AIPC 32-21-11-21-010 COTTER PIN (22) or AIPC 32-21-11-81-010 COTTER PIN (22) or AIPC 32-21-11-21-010 COTTER PIN (22).
(4) Install the wheels on the nose landing gear (Ref. AMM TASK 32-41-12-400-001).
Subtask 32-21-13-865-064-A ** ON A/C NOT FOR ALL (1) Install lock springs (31) and (32) on the lower end (Ref. AMM TASK 32-21-18-400-001).
(2) Install the taxi light (8LR) (Ref. AMM TASK 33-46-12-400-001).
(3) Install the actuating cylinder on the lower end:
(a) Engage the spherical end of the actuating cylinder (29) on pin (30).
NOTE: Make sure that the rigging hole of the pin is put vertically.
(b) Install the ring (26) and align the rigging holes. (c) Install the bush (25), bolt (28), washers (24) and (27) with the nut (23).
(d) TORQUE the nut (23) to between 2.0 and 1.7 m.daN (14.75 and 12.54 lbf.ft )
and safety it with a new AIPC 32-21-11-41-010 COTTER PIN (22) or AIPC 32-21-11-21-010 COTTER PIN (22) or AIPC 32-21-11-61-010 COTTER PIN (22) or AIPC 32-21-11-21-010 COTTER PIN (22) or AIPC 32-21-11-81-010 COTTER PIN (22) or AIPC 32-21-11-21-010 COTTER PIN (22). (4) Install the wheels on the nose landing gear (Ref. AMM TASK 32-41-12-400-001).
NOTE: Lower the aircraft to make the installation of the wheels easier.
D. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
Subtask 32-21-13-941-060-A ** ON A/C NOT FOR ALL | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 49VU | L/G/LGCIU/SYS1/NORM | 1GA | C09 |
| 121VU | HYDRAULIC/BRAKING AND STEERING/SYS2/SPLY | 4GG | M36 |
| 121VU | HYDRAULIC/BRAKING AND STEERING/SYS2/CTL | 3GG | M35 |
| 121VU | HYDRAULIC/BRAKING AND STEERING/SYS1/CTL | 1GG | M34 |
| 121VU | HYDRAULIC/BRAKING AND STEERING/SYS1/IND AND/SPLY | 2GG | M33 |
| 121VU | HYDRAULIC/LGCIU/SYS2 | 2GA | Q35 |
| 121VU | HYDRAULIC/LGCIU/SYS1/GRND SPLY | 52GA | Q34 |
E. Preparation for the Test
(1) Lubricate the nose landing gear (Ref. AMM TASK 12-22-32-640-002).
(2) Apply a layer of Polysulfide Sealant-Fuel Tank Brushable - (Material No.06ABA1) in areas E.
(3) Apply a layer of Polysulfide Sealant-Fuel Tank Fillet - (Material No.06ABB1) in areas F.
(4) Remove the access platform(s).
Subtask 32-21-13-720-054-B ** ON A/C NOT FOR ALL (1) Lubricate the nose landing gear (Ref. AMM TASK 12-22-32-640-002).
(2) Apply a layer of Polysulfide Sealant-Fuel Tank Brushable - (Material No.06ABA1) in areas E.
(3) Apply a layer of Polysulfide Sealant-Fuel Tank Fillet - (Material No.06ABB1) in areas F.
(4) Remove the access platform(s).
F. Test
(1) Do the functional test of the NLG normal extension and retraction (Ref. AMM TASK 32-31-00-720-003).
(2) Do a functional test of the Nose Wheel Steering (Ref. AMM TASK 32-51-00-720-003).
5. Close-up(1) Do the functional test of the NLG normal extension and retraction (Ref. AMM TASK 32-31-00-720-003).
(2) Do a functional test of the Nose Wheel Steering (Ref. AMM TASK 32-51-00-720-003).
Subtask 32-21-13-860-065-A ** ON A/C NOT FOR ALL
A. Put the aircraft back to its initial configuration.
(1) Lower the aircraft on its wheels (Ref. AMM TASK 07-11-00-586-001).
(2) Remove the safety barriers.
(3) Remove the WARNING NOTICE(S).
(4) Make sure that the work area is clean and clear of tools and other items.
Subtask 32-21-13-410-056-A ** ON A/C NOT FOR ALL (1) Lower the aircraft on its wheels (Ref. AMM TASK 07-11-00-586-001).
(2) Remove the safety barriers.
(3) Remove the WARNING NOTICE(S).
(4) Make sure that the work area is clean and clear of tools and other items.