(2)  
Lower the airplane (Ref 07-11-01/201).

 S 582-007
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 07-11-06
 ALL  ú ú 01 Page 204 ú Jun 10/97
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 JACKING AN ASYMMETRIC AIRPLANE - MAINTENANCE PRACTICES
______________________________________________________
 1.  General_______
 A.  This procedure contains two tasks. The two tasks give instructions to lift a 430,000-pound (195,000-kg) airplane that is not symmetrical. The first task gives instructions to lift an airplane with a center of gravity (CG) in a range of 22 to 29% MAC. The second task gives instructions to lift an airplane with a CG in a range of 26.5 to 29% MAC.
 B.  The first task contains the components that when you remove them, it is not necessary to supply special ballast or fuel transfer. The airplane CG must be in a range of 22 to 29% MAC. You can remove the components before you lift the airplane or while the airplane is on jacks.
 C.  The second task contains those components that when you remove them, you must transfer fuel or remove other components before you lift the airplane on jacks. The airplane CG must be in a range of 26.5 to 29% MAC. You must remove components before you lift the airplane on jacks.
 NOTE: After you lift the airplane in a condition that is not symmetrical
____ you can install the stabilizing jacks. Do not put a load of more than 2000 pounds (900 kg) on the stabilizing jacks. This will make sure the loads on the primary jack are not more than the approved limits.
 D.  This procedure contains the fuel transfer that is necessary to lift an airplane that does not have symmetrical conditions.
 E.  When you remove some of the largest components from the airplane, you can cause an airplane to be not symmetrical. Sometimes, special cautions and fuel transfer will then be necessary if you must lift the airplane with a jack.
 F.  To do this procedure the airplane must be in a hangar (or a no wind condition). The airplane must also weigh 430,000 pounds (195,000 kg) with a CG between 22 to 29% MAC.
 TASK 07-11-07-582-001
 2.  Lift an Asymmetric 430,000-Pound (195,000-kg) Airplane with CG between______________________________________________________________________ 22 to 29% MAC_____________
 A.  References
 (1)
07-11-01/201, Jacking Airplane

 (2)
32-09-02/201, Air/Ground Relay System

 B.  General
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 07-11-07
 ALL  ú ú 01 Page 201 ú Jun 15/98
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 CAUTION:_______YOU CAN ONLY REMOVE ONE OF THE ITEMS THAT FOLLOW AT A TIME. IF YOU REMOVE MORE THAN ONE ITEM AT A TIME, YOU CAN CAUSE DAMAGE TO THE EQUIPMENT.
 (1)  A condition that is not symmetrical results when you remove one of the items that follows:
 NOTE: You can remove components before you lift the airplane or
____
 after you lift the airplane on jacks.

 (a)  
The engine No. 2

 (b)  
The left outboard flap system which contains these components: 1) The foreflap, midflap, and aftflaps 2) The main carriages 3) The bogie assemblies 4) The main support track fittings 5) The fixed and movable flap track fairings 6) The mechanisms that operate all the fairings and flaps.

 (c)  
The right outboard flap system

 (d)  
The left inboard flap system

 (e)  
The right inboard flap system

 (f)  
The left inboard and outboard flap systems

 (g)  
The right inboard and outboard flap systems

 (h)  
The left body landing gear

 (i)  
The right body landing gear

 (j)  
The left wing landing gear

 (k)  
The right wing landing gear
　
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 LIFTING AND SHORING(22)