747-400 AMM 飞机维护手册 限制/维护检查(60)

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 S 712-004
 (1)  Retract and then extend the nose landing gear with the normal system to make sure it operates correctly.
 (a)  Do this task: Nose Landing Gear Extension and Retraction System - Functional Test (Airplane on the Jacks) (AMM 32-34-00/501).
 D.  Nose Landing Gear Inspections
 S 202-005
 (1)  Examine the nose landing gear areas that follow:
 (a)  
Nose Landing Gear Torsional Freeplay Inspection, do this task: Nose Landing Gear Torsion Link Connection (AMM 32-21-03/601).

 (b)  
Examine the shock strut of the nose landing gear to make sure the pressure is satisfactory. 1) Do this task: Nose Landing Gear Shock Strut Servicing

 (AMM 12-15-05/301).

 (c)  
If there is damage to the nose landing gear, do these steps: 1) Remove the inner cylinder and examine it for distortion and cracks.

 2)  Make sure there are no loose fasteners in the web of the nose wheel wall near the trunnion support fittings.
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747-400 MAINTENANCE MANUAL
 (d)  
Do a check of the rigging of the steering mechanism.

 1)  Do this task: Nose Landing Gear Steering System -Functional Test (AMM 32-51-00/501).

 (e)  
Do a check of the steering system: 1) Do this task: Nose Landing Gear Steering System -Functional Test (AMM 32-51-00/501). 2) Remove and examine the actuators, do this task: Nose

 Landing Gear Steering Actuator Removal (AMM 32-51-05/401). 3) Examine the attach pins. 4) Examine the steering plate.
 S 212-006
 (2)  Examine the areas of the body landing gear that follow:
 (a)  
the body landing gear tires (AMM 32-45-04/601)

 (b)  
the body landing gear wheels (AMM 32-45-03/601)

 (c)  
the body landing gear truck beams

 (d)  
the body landing gear truck torque links

 (e)  
the body landing gear drag strut linkage

 (f)  
the body landing gear side strut

 (g)  
the body landing gear trunnion link for cracks and bolt distortion

 (h)  
the body landing gear shock strut upper end for signs of cracks or bolt distortion

 (i)  
the body landing gear outer cylinder lugs.

 (j)  
Remove and disassemble the inner cylinder of the body gear for and inspection if you find (AMM 32-13-02/401): 1) damage in the 9 steps listed above, or

 S 212-007
 (3)  Examine the areas of the wing landing gear that follow:
 (a)  
the wing landing gear tires (AMM 32-45-04/601)

 (b)  
the wing landing gear wheels (AMM 32-45-03/601)

 (c)  
the wing landing gear truck beams

 (d)  
the wing landing gear truck torque links

 (e)  
the wing landing gear drag strut linkage

 (f)  
the wing landing gear side strut

 (g)  
the wing landing gear trunnion link for cracks and bolt distortion

 (h)  
the wing landing gear shock strut upper endfor signs of cracks or bolt distortion

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747-400
MAINTENANCE MANUAL

 (i)  
the wing landing gear outer cylinder lugs

 (j)  
the wing landing gear beam for cracks and bolt distortion.

 (k)  
remove and disassemble th inner cylinders of the wing gear for and inspection if you find (AMM 32-11-02/401): 1) damage in the 9 steps above, or 2) the fluid level in the shock struts is low.

 (l)  
Repair the wing landing gear if it is necessary (AMM 32-11-02/801).

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