(2)
Install the bolt (20) with its head up and install the nut (23).
(3)
TORQUE the nut (23) to between 1.7 and 2 m.daN (12.53 and 14.74 lbf.ft) and safety it with a cotter pin (22).
(4)
Install the wheels on the nose landing gear (Ref. TASK 32-41-12-400-001).
NOTE : Lower the aircraft to make the installation of the wheels
____
easier.
(5) Install the towing fitting (Ref. TASK 32-21-41-400-001).
**ON A/C ALL
Subtask 32-21-13-865-053
D. Remove the safety clip(s) and the tag(s) and close this(these) circuit
breaker(s): R 1GG, 2GG, 3GG, 4GG, 1GV
Subtask 32-21-13-941-053
E. Preparation for the Test
(1)
Fill the shock absorber with hydraulic fluid (Ref. TASK 12-12-32-611-005).
(2)
Charge the shock absorber with nitrogen (Ref. TASK 12-14-32-614-004).
1EFF : ALL 1 32-21-13Page 432 1 1 May 01/05 1 1 1CES 1
(3) With the shock absorber fully extended, make sure that the wheel axle is perpendicular to the aircraft centerline.
NOTE : In the fully extended position of the shock absorber, the NLG
____ is automatically centered (the nose wheel steering is in the zero position).
(a) Make sure that 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.). (Ref. Fig. 404/TASK 32-21-13-991-009)
(4)
Lubricate the nose landing gear (Ref. TASK 12-22-32-640-002).
(5)
Apply a layer of SEALANTS (Material No. 09-001) in areas E.
(6)
Apply a layer of SEALANTS (Material No. 09-002) in areas F.
(7) Remove the access platform(s). R **ON A/C 001-049, 101-149, 151-199, 201-299, 301-399, 401-499,
Subtask 32-21-13-720-051
F. Test
(1) Do the functional test of the NLG normal extension and retraction (Ref. TASK 32-31-00-720-003) or (Ref. TASK 32-31-00-720-002).
**ON A/C 051-099,
Subtask 32-21-13-720-051-A
F. Test
(1)
Do the functional test of the NLG normal extension and retraction (Ref. TASK 32-31-00-720-003) or (Ref. TASK 32-31-00-720-002).
(2)
Do the operational test of the tire pressure indicating system (Ref. TASK 32-49-00-710-001).
1EFF : ALL 1 32-21-13Page 433 1 1 Aug 01/05 1 1 1CES 1R **ON A/C ALL
5. Close-up
________
Subtask 32-21-13-860-051
A. Put the aircraft back to its initial configuration.
(1)
Lower the aircraft on its wheels (Ref. 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 tool(s) and other items.
Subtask 32-21-13-410-051
B. Close Access
(1) Close the nose gear doors (Ref. TASK 32-22-00-410-001).
1EFF : ALL 1 32-21-13Page 434 1 1 May 01/05 1 1 1CES 1 TASK 32-21-13-960-001
Replacement of the NLG Shock Absorber Dynamic Seals
WARNING : MAKE SURE THAT THE GROUND SAFETY-LOCKS ARE IN POSITION ON THE LANDING
_______ GEAR.
WARNING : MAKE SURE THAT THE TRAVEL RANGES OF THE FLIGHT CONTROL SURFACES ARE
_______ CLEAR BEFORE YOU PRESSURIZE/DEPRESSURIZE A HYDRAULIC SYSTEM.
WARNING : USE SOLVENTS/CLEANING AGENTS, SEALANTS AND OTHER SPECIAL MATERIALS
_______ ONLY WITH A GOOD SUPPLY OF AIR. OBEY THE MANUFACTURERS INSTRUCTIONS. PUT ON PROTECTIVE CLOTHING. DO NOT GET THEM IN YOUR MOUTH. DO NOT SMOKE. DO NOT BREATHE THE GAS. THESE MATERIALS ARE POISONOUS, FLAMMABLE AND SKIN IRRITANT. GET MEDICAL HELP IF YOUR SKIN OR EYES BECOME IRRITATED.
1. Reason for the Job
__________________
This procedure tells you how to replace the dynamic seals on the NLG shock absorber when there is leakage at the upper cam (between the sliding rod and the cylinder).
NOTE : To replace the dynamic seals, it is necessary to open the shock
____ absorber. Because of the risk of contamination, you must do this task in a very clean environment. Thus, the manufacturer recommends that you do this procedure in a shop. If it is not possible to do the procedure in a shop, use all the necessary precautions to prevent pollution.
NOTE : If a leakage from the NLG shock absorber has occured, one return
____
flight is permitted for repair to be completed, if:
-
the leak rate from the turning table drain hole is less than 10 drops/min, weight on wheels
中国航空网 www.aero.cn
航空翻译 www.aviation.cn
本文链接地址：A320飞机维护手册 AMM LANDING GEAR 起落架3(87)
