747-400 AMM 飞机维护手册 起落架 LANDING GEAR 3(148)

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4  PIN  5  8.760  8.785  8.829  0.076  X  1 
BUSHING  6  8.747  8.753  8.709  4  1 
5  BUSHING  7  7.060  7.064  7.074  0.018  4  1 
BUSHING  8  7.038  7.058  2  1 
6  BUSHING  9  2  1 
BUSHING  10  4.691  4.700  4.686  3  1 
7  PIN  ID  0.2030  0.2070  0.2200  0.032  X  1 
BOLT  OD  0.1885  0.1895  0.1875  X  1 
8  BUSHING  ID  2.0000  2.0020  2.0055  0.0068  X  1 
BOLT  OD  1.9980  1.9990  1.9950  X  1 
9  BUSHING  ID  2.0000  2.0020  2.0045  0.0058  11  1 
BOLT  OD  1.9980  1.9990  1.9950  X  1 

Nose Gear Tripod Brace Wear Limits
Figure 601 (Sheet 4)

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747-400
MAINTENANCE MANUAL

INDEX NO.  PART NAME  DIM.  DESIGN LIMITS  WEAR LIMITS  REPLACE PART WORN  REPAIR WORN PART  REPAIR INSTR. 
DIAMETER  MAX WEAR DIM. 15  DIAM CLEAR-ANCE MAX 
MIN  MAX 
10  BUSHING  7  8.190  8.194  8.201  0.014  4  1 
BUSHING  12  8.183  8.193  8.180  11  1 
11  BOLT  13  10.567  10.585  10.595  0.040  X  1 
BUSHING  14  10.555  10.565  10.540  4  1 
12  BOLT  ID  0.203  0.207  0.2200  0.032  X 
BOLT  OD  0.1885  0.1895  0.1875  X 
13  BUSHING  ID  2.5000  2.5010  2.5050  0.0062  11  1 
BOLT  OD  2.4980  2.4990  2.4950  X  1 
14  BUSHING  ID  2.5000  2.5010  2.5050  0.0062  3  1 
BOLT  OD  2.4980  2.4990  2.4950  X  1 
15  BUSHING  14  4.933  4.942  4.965  0.032  11  1 
BUSHING  10  4.926  4.933  4.910  3  1 
16  BOLT  13  7.265  7.275  7.285  0.040  X  1 
BUSHING  15  11  1 
17  BOLT  ID  0.203  0.207  0.220  0.032  X 
BOLT  OD  0.1885  0.1895  0.1875  X 

Nose Gear Tripod Brace Wear Limits
Figure 601 (Sheet 5)

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747-400
MAINTENANCE MANUAL

WORN PART OR ASSEMBLY IS REPAIRABLE. REFER TO OVERHAUL MANUAL FOR REPAIR INFORMATION.
REPLACE DRAG STRUT. REFER TO 32-21-04.
REPLACE LOWER TRIPOD BRACE. REFER TO 32-21-05.
REPLACE UPPER TRIPOD BRACE. REFER TO 32-21-05.
LENGTH OF PIN SHOULDER TO SHOULDER, PLUS ANY GAP FROM TURNING BACK NUT, LESS THICKNESS OF WASHER.
WIDTH OVER FLANGES OF BUSHINGS IN UPPER TRIPOD BRACE.
DISTANCE BETWEEN FLANGES OF BUSHINGS IN UPPER TRIPOD BRACE.
WIDTH OVER FLANGES OF BUSHINGS IN LOWER DRAG STRUT.
DISTANCE BETWEEN FLANGES OF BUSHINGS IN LOWER DRAG STRUT.
WIDTH OVER FLANGES OF BUSHINGS IN LOWER TRIPOD BRACE.
REPLACE NOSE LANDING GEAR. REFER TO 32-21-01.
WIDTH OVER FLANGES OF BUSHINGS IN OUTER CYLINDER.
DISTANCE BETWEEN SHOULDER AND HEAD OF BOLT PLUS POSSIBLE ONE-SIXTH TURN BACK OF NUT.
DISTANCE BETWEEN FLANGE FACES IN OUTER CYLINDER.
WIDTH OVER FLANGES OF BUSHINGS IN OUTER CYLINDER.
LIMITS SHOWN MAY BE EXCEEDED PROVIDED MAXIMUM CLEARANCE IS NOT EXCEEDED.

Nose Gear Tripod Brace Wear Limits
Figure 601 (Sheet 6)

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