747-400
MAINTENANCE MANUAL

AFT OUTBOARD 
BRAKE LINE 
FORWARD OUTBOARD 
BRAKE LINE  TRUCK POSITIONER LINE 
FORWARD INBOARD 
BRAKE LINE  BODY GEAR 
STEER EXTEND 
OUTBD 
AFT INBOARD 
BRAKE LINE 
BODY GEAR STEER 
RETRACT LINE 
PLACARD 
STA 1460 
BRACKET 
STEER EXTEND 
OUTBD 
(FROM 1460 
BRACKET) 

STEER EXT INBD (FROM 1480 BLKHD)
HYDRAULIC LINE SUPPORT ASSEMBLY BRACKET
BODY GEAR STEER
FWD RETRACT LINE
Body Landing Gear Hydraulic Line Identification
Figure 403 (Sheet 3)

EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 32-13-01
 ALL  ú ú 01 Page 411 ú Oct 10/88
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 (b)  
Disconnect the landing gear wire bundle from the panel in the connection box.

 (c)  
Disconnect the electrical conduit from the connection box and conduit clamp. 1) Tie the conduit end to the side brace.

 S 864-012
 (3)  
Provide electrical power, if required (AMM 24-22-00/201).

 S 034-013

 (4)  
Disconnect the hydraulic hoses at the outboard end of the trunnion.

 NOTE: Tie the hoses to the structure to avoid interference with
____
 gear removal.

 S 034-063
 (5)  
Cap the lines and plug the fittings (Fig. 403).

 S 034-014

 (6)  
Disconnect the shock strut inboard door strut from the landing gear (AMM 32-14-05/401).

 NOTE: Secure the shock strut inboard door strut to the airplane
____
 structure to keep away from the gear.

 S 034-015
 (7)  Disconnect the shock strut outboard door strut from the landing gear (AMM 32-14-06/401).
 NOTE: Both the inboard and outboard doors can be removed to
____
 facilitate the body gear removal.

 NOTE: Tie the shock strut outboard door strut to the structure to
____
 provide clearance.

 S 034-016
 WARNING:_______THE ACTUATOR WEIGHS APPROXIMATELY 136 POUNDS. MAKE SURE THE ACTUATOR IS ADEQUATELY RESTRAINED TO AVOID INJURY TO PERSONNEL AND DAMAGE TO PARTS.
 (8)  Disconnect the lower end of the retract actuator from the shock strut (AMM 32-33-01/401).
 NOTE: Compress the actuator rod and tie it securely with the sling
____
 to avoid its interference with the gear removal.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 32-13-01
 ALL  ú ú 04 Page 412 ú Oct 15/98
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 S 494-017
 (9)  
Install the bungee restraining tool on the downlock bungee. S 034-018

 (10)
 Disconnect the drag strut universal from the shock strut (AMM 32-13-07/201).

 WARNING:_______ THE DRAG STRUT COMPONENT ASSEMBLY WEIGHS APPROXIMATELY 330
 POUNDS.  THE BUNGEE IS SPRING LOADED.  MAKE THE SURE PARTS ARE
 ADEQUATELY SUPPORTED BEFORE REMOVING THE BOLT OR INJURY TO
 PERSONNEL OR DAMAGE TO EQUIPMENT MAY RESULT.

 NOTE: Tie the drag strut assembly and universal to the airplane
____ structure to avoid their interference with gear removal.
 S 014-020
 (11)
 Remove the keel beam access panel (193U) under the inboard trunnion support assembly.

 S 024-021

 (12)
 Remove the body landing gear (24) (Fig. 402).

 (a)  
Remove the four bolts (9) which hold the inboard trunnion bearing cap (7), thus allowing the removal of the cap, lower bushing half (10) and bearing retention key (6).

 NOTE: Note the position of the cap, bushings and retention key
____ to facilitate their reinstallation.
 (b)  
Hold the nut (2) with the special tool if it is necessary.
　
中國航空網 www.k6050.com
航空翻譯 www.aviation.cn
本文鏈接地址：747-400 AMM 飛機維護手冊 起落架 LANDING GEAR 2(126)