747-400 AMM 飞机维护手册 飞行操纵 FLIGHT CONTROLS 3(68)

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 C.  In the second task you measure the inner or outer diameter of the parts which attach the PCP to the control pushrods. The parts include bearings, bushings, cranks, and bolts.
 NOTE: Missing Power Control Package, rod end and trunnion bearing
____ dust seals are not reasons for removing the control package. Seals should be replaced at convenience on overhaul. The bearing will generate a small amount of dark colored powder which may be observed at the edge of the bearing lines. This powder is the normal product of the self lubricating bearing liner.
 TASK 27-31-07-206-001
 2.  Inboard Elevator Power Control Package Attachment Fittings Inspection_____________________________________________________________________
 A.  Standard Tools
 (1)  
Micrometer - 0-1 inch, 1-2 inch, and 2-3 inch

 (2)  
Vernier Caliper

 B.  
References

 (1)  
06-09-06/201, Stabilizer and Elevator Access Doors and Panels

 (2)  
27-31-07/201, Inboard Elevator Power Control Package

 C.  
Access

 (1)  
Location Zone 334 Horizontal Stabilizer, Rear Spar to Trailing Edge, LH 344 Horizontal Stabilizer, Rear Spar to Trailing Edge, RH

 D.  
Procedure

 S 036-002
 (1)  
Do this task: "Inboard Elevator Power Control Package Removal" (Ref 27-31-07/201).

 S 226-003

 (2)  
Measure the parts, which connect the power control package to attachment fittings, for worn areas.

 (a)  
Use a micrometer or a vernier caliper to measure the parts.

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747-400
MAINTENANCE MANUAL

INPUT CONTROLSEE A 2. BUSHING/BOLT ROD
BEARING/BOLT VALVE LEVER 1. 
REAR SPAR STABILIZER  A 
BUSHING/BOLT7. ACTUATOR RAM TRUNNION 3. BUSHING/BUSHING ACTUATOR RAM  A A  ELEVATOR INBOARD 
BUSHING/BOLT4. 
ELEVATOR ATTACHMENT LUG FITTING 
BUSHING/BUSHING6.  Figure 601 (Sheet 1) Inboard Elevator Power Control Package Wear Limits A-A BEARING/BOLT5. 

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 ALL  ú ú 01 Page 602 ú Feb 10/91
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747-400
MAINTENANCE MANUAL

INDEX NO.  PART NAME  DIM.  DESIGN LIMITS  WEAR LIMITS  WORN PART REPLACE  PART WORN REPAIR  INSTR. REPAIR 
DIAMETER  MITTED PER-DIM. WEAR  MAX ANCE CLEAR-DIAM 
MIN  MAX 
1  BEARING  ID  0.3747  0.3750  0.3750  0.0019  X  54 
BOLT  OD  0.3735  0.3745  0.3731  X  3 
2  BUSHING  ID  0.3745  0.3755  0.3764  0.0033  X 
BOLT  OD  0.3735  0.3745  0.3731  X  3 
3  BUSHING  ID  2.3125  2.3135  2.3152  0.0035  X 
BUSHING  OD  2.3107  2.3117  2.3090  X 
4  BUSHING  ID  1.9994  2.0000  2.0010  0.0026  X 
BOLT  OD  1.9984  1.9992  1.9974  X 
5  BEARING  ID  1.9995  2.0000  2.0010  0.0026  1  4 
BOLT  OD  1.9984  1.9992  1.9974  X 
6  BUSHING  ID  2.3750  2.3760  2.3777  0.0035  X 
BUSHING  OD  2.3732  2.3742  2.3715  X 
7  BUSHING  ID  1.9994  2.0000  2.0010  0.0026  X  2 
BOLT  OD  1.9984  1.9992  1.9974  X  2 

REPLACE THE BEARING WHEN THE TEFLON LINER HAS WORN 0.010 MAXIMUM RADIALLY.
THE SURFACE IS BONDED, IF THE BOND BECOMES LOOSE BOND THE SURFACES PER BMS 5-29.
THIS IS A CLAMP-UP JOINT. THERE IS NO PLAY AFTER YOU TIGHTEN THE BOLT.
THE LIMITS SHOWN ARE BEFORE THE BEARING RETENTION. NO CLEARANCE IS PERMITTED AFTER YOU SWAGE.
　
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