747-400 AMM 飞机维护手册 起落架 LANDING GEAR 3(143)

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0.0009 TO 0.0042 INCH. MAXIMUM OVERSIZE HOLE IN BRACE 2.75 INCHES.
*[23]  LENGTH OF PIN SHOULDER TO SHOULDER, PLUS ANY GAP FROM TURNING BACK NUT, LESS THICKNESS OF WASHER.
*[24]  WIDTH OVER FLANGES OF BUSHINGS IN UPPER TRIPOD BRACE.
*[25]  SHIM UNDER FLANGES OF BUSHING 0.015 MAXIMUM EACH SIDE OR *[22].
*[26]  DISTANCE BETWEEN FLANGES OF BUSHING IN UPPER TRIPOD BRACE.
*[27]  WIDTH OVER FLANGES OF BUSHINGS IN LOWER DRAG STRUT.
*[28]  DISTANCE BETWEEN FLANGES OF BUSHINGS IN LOWER DRAG STRUT.
*[29]  WIDTH OVER FLANGES OF BUSHINGS IN LOWER TRIPOD BRACE.
*[30]  LIMITS SHOWN MAY BE EXCEEDED PROVIDED MAXIMUM CLEARANCE IS NOT EXCEEDED.
Nose Gear Drag Strut Wear Limits
Figure 601 (Sheet 7)

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A
747-400
MAINTENANCE MANUAL

 (c)  If the part is not in tolerance, replace the part if you cannot repair it.
 S 426-004
 (3)  Do this task: "Installation of the Drag Strut on the Nose Landing Gear" (Ref 32-21-04/401).
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747-400 MAINTENANCE MANUAL
 NOSE LANDING GEAR TRIPOD BRACE ASSEMBLY - REMOVAL/INSTALLATION
______________________________________________________________
 1.  General_______
 A. This procedure contains two tasks:
 (1)  
The removal of the tripod brace assembly of the nose landing gear.

 (2)  
The installation of the tripod brace assembly of the nose landing gear.

 TASK 32-21-05-004-001
 2.  Nose Landing Gear Tripod Brace Assembly Removal (Fig. 401)_______________________________________________
 A. Special Tools and Equipment
 (1)  
PRE65B01202-1 Tripod Apex Pin Thread Protector

 B.
References

 (1)  
AMM 07-11-02/201, Jacking Airplane Nose

 (2)  
AMM 09-11-00/201, Towing

 (3)  
AMM 32-00-30/201, Landing Gear Door Locks

 (4)  
AMM 32-21-07/401, Nose Gear Bullnose Assembly

 (5)  
AIPC 32-21-05 Fig. 1

 (6)  
AIPC 32-61-58 Fig. 1

 C.
Access

 (1)  
Location Zone
 715 Nose Landing Gear

 D.
Prepare for the Procedure

 S 494-025
 (1) Install the ground locks in all landing gear (AMM 09-11-00/201).
 S 494-026
 WARNING: YOU MUST CAREFULLY DO THE STEPS IN THE TASK BELOW TO INSTALL
_______ THE DOOR LOCKS ON THE LANDING GEAR DOORS. THE DOORS CAN CLOSE QUICKLY IF YOU DO NOT INSTALL THE DOOR LOCKS CORRECTLY. THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 (2)  Do this task: "Installation of the Door Locks on the Nose Landing Gear" (AMM 32-00-30/201).
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747-400
MAINTENANCE MANUAL

SEE A
LOWER  SHOCK STRUT 
TRIPOD  OUTER 
BRACE  CYLINDER 

NUT 
NOSE WHEEL WELL CONTROL PANEL 
NUT 
WASHER  TIEROD STIRRUP 
FWD 
A 
Nose Gear Control Panel Installation Figure 401 

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