52-32-01
 ALL  ú ú 04A Page 615 ú Jun 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 b) Look for loose wires.
 (b)  
Examine the condition of the torque tubes as follows: 1) Look for corrosion. 2) Look for loose or missing fasteners. 3) Look for damage.

 (c)  
Examine the condition of the rotary actuators as follows: 1) Look for corrosion. 2) Look for damage. 3) Make sure the rotary actuators are attached securely to the

 airplane structure. 4) Make sure there is a clearance at the upstops.

 (d)  
Examine the condition of the lift links as follows: 1) Look for corrosion. 2) Look for damage. 3) Make sure you can turn the lift links by hand.

 S 866-066
 (4)  
Close the door.

 S 416-067

 (5)  
Install the access panel inboard of the door hinge.

 TASK 52-32-01-206-075
 7.  Door Hinge/Lift Mechanism - Inspection/Check____________________________________________
 NOTE: This is a scheduled maintenance task.
____
 A. References
 (1)  
52-32-00/001, Side Cargo Door

 B.
Access

 (1)  
Access Panels
 836L Door, Main Deck Cargo

 C.
Procedure

 S 016-072
 WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE AWAY FROM THE DOOR AND
_______ THE DOOR OPENING WHEN YOU OPERATE THE DOOR. FAILURE OF THE LIFT MECHANISM CAN CAUSE THE DOOR TO CLOSE QUICKLY WHICH CAN CAUSE INJURY OR DAMAGE.
 (1)  Open the side cargo door for access (Ref 52-32-00/001).
 NOTE: You can operate the door manually or electrically.
____
 S 216-068
 (2)  
Do a check of the condition of the hinges.

 (a)  
Look for corrosion.

 (b)  
Look for loose or missing fasteners.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 52-32-01
 ALL  ú ú 03A Page 616 ú Jun 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 (c)  Look for damage.
 S 216-069
 (3)  
Do a check of the lift mechanism.

 (a)  
Look for corrosion in the lift power unit, the torque tubes and the rotary actuators.

 (b)  
See that the lift power unit is securely attached to the structure.

 (c)  
See that the torque tubes are securely attached to the lift power unit.

 (d)  
See that the torque tubes are securely attached to the rotary actuators.

 (e)  
See that the rotary actuators are securely attached to the structure.

 (f)  
See that the actuator links are securely attached to the rotary actuators and the door.

 (g)  
Look for loose or missing fasteners.

 S 016-071
 (4)  Close the side cargo door (AMM 52-32-00/001).
 TASK 52-32-01-226-080
 8.  Cargo Door Wear Limits (Fig. 601)______________________
 A. General
 (1)  Wear on the inner surface of the shroud may occur if the pressure relief door stop fittings or stop bolts contact the shrouds. This condition is acceptable. It will not affect the pressure relief door operation or function of the shroud.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 52-32-01
 ALL  ú ú 03A Page 617 ú Jun 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 LIFT POWER UNIT - REMOVAL/INSTALLATION
______________________________________
 1.  General_______
 A. This procedure contains two tasks:
 (1)  
The removal of the lift power unit

 (2)  
　
中國航空網 m.k6050.com
航空翻譯 www.aviation.cn
本文鏈接地址：747-400 AMM 飛機維護手冊 艙門 DOORS 2(136)