- move the NLG shock absorber upwards by 70 mm min. (2.8 in.) with the jack to disengage the cams. Do this operation two times

 - manually operate the nose wheels (rotation of the shock absorber plus or minus 45 degrees)

 - hold the leg in this position for one hour

 - do the lowering of the aircraft at forward jacking point, MLG wheels on the ground (Ref. AMM TASK 07-11-00-586-001).

 (1) If the fault continues:

 - do the lubrication of the NLG (Ref. AMM TASK 12-22-32-640-002).

 (2) If the fault continues:

 - do the inspection/check of the torque link assembly of the nose landing gear (Ref. AMM TASK 32-21-00-200-003).

 (3) If the fault continues:

 - do the inspection/check of the clearance of the nose gear hinge bearings (Ref. AMM TASK 32-21-00-200-004).

 (4) If the fault continues:

 - replace the nose wheel steering cylinder (Ref. AMM TASK 32-51-42-000-001) and (Ref. AMM TASK 32-51-42-400-001).

 (5) If the fault continues:

 - replace the shock absorber (Ref. AMM TASK 32-21-13-000-001) and (Ref. AMM TASK 32-21-13-400-001).

 (6) If the fault continues:

 - replace the LEG ASSY-NLG (2526GM) (Ref. AMM TASK 32-21-11-000-002) and (Ref. AMM TASK 32-21-11-400-002).
 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞32-20-00∞∞∞∞∞∞∞∞∞∞Page 202
 May 01/04 CES

 Location of the Fluid Injection Method (Absorber Assy - NLG Shock)
 Figure 201/TASK 32-20-00-991-001

 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞32-20-00∞∞∞∞∞∞∞∞∞∞Page 203
 Feb 01/98 CES TASK 32-20-00-810-801- 01

 Grinding Noise of the NLG during Taxiing or Towing
 1. Possible Causes
_______________
 - LEG ASSY-NLG (2526GM)

 - nose wheel steering cylinder

 - shock absorber

 2. Job Set-up Information
______________________
 A. Consumable Materials
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
Material No. 02-001  USA MIL-H-5606
 OIL, HYDRAULICPETROLEUM FLUID (Ref. 20-31-00)

 B. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 12-22-32-640-002 Lubrication of the NLG and Doors R AMM 32-21-00-200-003 Check Torque Links for Excessive Play AMM 32-21-00-200-004 Inspection/Check of the Clearance of the Nose-Gear
 Hinge Bearings AMM 32-21-11-000-002 Removal of the NLG Leg Assy (2526GM) AMM 32-21-11-400-002 Installation of the NLG Leg Assy (2526GM) AMM 32-21-13-000-001 Removal of the NLG Shock Absorber Assy AMM 32-21-13-400-001 Installation of the NLG Shock Absorber Assy AMM 32-51-00-720-003 Functional Test of the Nose Wheel Steering with the
 Handwheel. AMM 32-51-42-000-001 Removal of the Nose Wheel Steering Cylinder AMM 32-51-42-400-001 Installation of the Nose Wheel Steering Cylinder 32-20-00-991-001 Fig. 201
 3. Fault Confirmation
__________________
 A. Not applicable.

 4. Fault Isolation
_______________

R  A. If there is a grinding noise from of the NLG during taxiing or towing 
R R R R R  NOTE : The noise is because there is not sufficient lubrication in the____ shock absorber.This condition does not have an effect on safety.If it is not possible to do the lubrication procedure immediately (because there is not sufficient time or equipment),do it at the first opportunity.
 - add half a liter of hydraulic fluid HYDRAULIC FLUIDS (Material No. 02-001) through the upper orifice of the leg on the internal wall of the barrel with a syringe so that the fluid runs down to the Airflon coated ring (Ref. Fig. 201/TASK 32-20-00-991-001) - operate the nose wheels (Ref. AMM TASK 32-51-00-720-003) (rotation of the shock absorber plus or minus 45 degrees) - hold the leg in this position for one hour
 (1) If the fault continues: - do the lubrication of the NLG (Ref. AMM TASK 12-22-32-640-002).
 (2) If the fault continues: - do the inspection/check of the torque link assembly of the nose landing gear (Ref. AMM TASK 32-21-00-200-003).
 (3) If the fault continues: - do the inspection/check of the clearance of the nose gear hinge bearings (Ref. AMM TASK 32-21-00-200-004).
 (4) If the fault continues: - replace the nose wheel steering cylinder (Ref. AMM TASK 32-51-42-000-001) and (Ref. AMM TASK 32-51-42-400-001).
　
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