S 412-019
 (2)  Hold the access panel for the trailing edge (571AB LH and 671AB RH) (AMM 06-09-08/201).
 S 092-028
 WARNING: YOU MUST CAREFULLY DO THE STEPS IN THE TASK BELOW TO REMOVE THE
_______ DOOR LOCKS FROM THE LANDING GEAR DOORS. THE DOORS CAN CLOSE QUICKLY IF YOU DO NOT REMOVE THE DOOR LOCKS CORRECTLY. THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 (3)  
Do this task: "Removal of the Door Locks on the Wing Landing Gear" (AMM 32-00-30/201).

 S 092-029

 (4)  
Do this task: "Removal of the Door Locks on the Body Landing Gear" (AMM 32-00-30/201).

 TASK 32-11-16-202-021
 4. Bolt For The Walking Beam for Worn Areas Inspection (Fig. 201)
____________________________________________________
 A. References
 (1)  
AMM 32-11-15/401, Wing Gear Walking Beam

 (2)  
AIPC 32-11-15 Fig. 2

 B.
Access

 (1)  
Location Zone 571 Rear Spar to Landing Gear Support Beam, LH 671 Rear Spar to Landing Gear Support Beam, RH

 C.
Procedure

 S 032-022
 (1)  
Disconnect the walking beams and retract the actuator from the support bolt (Ref Walking Beam-to-Hanger Removal).

 S 222-023

 (2)  
Examine the worn limits of the bushings, the bolt, the bearing, the walking beam and the support.

 (a)  
Measure the parts if it is necessary and compare the measured dimensions to the limit dimensions.

 (b)  
If the part is not in the tolerance, repair or replace it when it is necessary.

 S 432-024
 (3)  Install the walking beam and the actuator to the walking beam support (Ref Walking Beam-to-Hanger Installation).
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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A
747-400 MAINTENANCE MANUAL
 WALKING BEAM SUPPORT - REMOVAL/INSTALLATION
___________________________________________
 1.  General
_______
 A.  This procedure has two tasks:
 (1)  
The removal of the walking beam support for the wing landing gear (referred to as the walking beam support).

 (2)  
The installation of the walking beam support.

 B.  
The walking beam support (hanger) holds the outboard ends of the walking beams and of the wing gear actuator to the airplane structure. The bolt

 (9)
 is threaded at each end to help the removal and the installation. You must remove it as an assembly with the walking beam support (hanger).

 TASK 32-11-18-004-001
 2.  Walking Beam Support Removal (Fig. 401)
___________________________
 A.  References
 (1)  
06-09-08/201, Wing Access Doors and Panels

 (2)  
09-11-00/201, Towing

 (3)  
29-11-00/201, Main Hydraulic Supply System

 (4)  
32-00-30/201, Landing Gear Door Locks

 (5)  
32-11-15/401, Wing Gear Walking Beam

 (6)  
32-32-01/401, Wing Gear Actuator

 (7)  
IPC 32-11-18 Fig. 10

 B.  
Access

 (1)  
Location Zone 571 Rear Spar to Landing Gear Support Beam, LH 671 Rear Spar to Landing Gear Support Beam, RH

 C.  
Prepare for the Removal

 S 864-034
 WARNING: YOU MUST CAREFULLY INSTALL THE GROUND LOCKS IN ALL LANDING
_______ GEAR. AN ACCIDENTAL RETRACTION OF THE LANDING GEAR CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
 (1) Install the ground locks in all landing gear (Ref 09-11-00/201).
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

747-400 
MAINTENANCE MANUAL 
SEE  A 
WALKING BEAM 
SUPPORT 
SEE  B 
　
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