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 2.  Landing Gear Support Beam Structure (Fig. 1)___________________________________
 A.  The support beam is made of a strong web with angle chords at the top and bottom and an outboard terminal fitting. There are six components attached to the support beam of the landing gear:
 (1)
The inboard track of the inboard flap.

 (2)
The wing trunions.

 (3)
The support fitting of the walking beam.

 (4)
The aft support hinge to the outboard door for the wing gear strut.

 (5)
The support fitting to the flap track.

 (6)
The stabilizer rod.

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 57-15-00
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

747-400
MAINTENANCE MANUAL

SEE  B 
SEE  A 
WALKING 
BEAM SUPPORT 
LANDING GEAR 
SUPPORT BEAM 
FLAP TRACK  BEAM UPPER CHORD 
WING LANDING  LANDING GEAR SUPPORT BEAM 
PIN CONNECTION  GEAR TRUNNION 
BEARING 
WEB 

REAR SPAR 
STABILIZER 
ROD 
WALKING BEAM 
SUPPORT BEARING  BEAM 
WING LANDING GEAR  LOWER 
TRUNNION BEARING  CHORD 
FWD  DOOR AFT HINGE SUPPORT WING GEAR STRUT OUTBOARD 
LANDING GEAR SUPPORT BEAM 
A
Landing Gear Support Beam 
Figure 1 (Sheet 1) 

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

LANDING GEAR 
SUPPORT BEAM 
WING LANDING  UPPER CHORD 
GEAR SIDE 
STRUT 
LANDING GEAR 
SUPPORT BEAM 

LANDING GEAR SUPPORT BEAM LOWER CHORD
FUSELAGE BULKHEAD STATION 1350
FWD
LANDING GEAR SUPPORT BEAM ATTACHMENT
B
Landing Gear Support Beam Figure 1 (Sheet 2)
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 LANDING GEAR SUPPORT BEAM - MAINTENANCE PRACTICES
_________________________________________________
 1.  General
_______
 A.  This section contains a task to replace a bolt in the support beam for the landing gear that is unserviceable.
 B.  To replace the bolt, you must do these steps:
 (1)
Install the door locks on the landing gear doors.

 (2)
Remove the unserviceable bolt.

 (3)
Apply the sealant to the new bolt if it is necessary.

 (4)
Install a new bolt.

 (5)
Remove the door locks from the landing gear doors.

 TASK 57-15-00-962-001
 2.  Landing Gear Support Beam Bolt Replacement
__________________________________________
 A.  Consumable Materials
 (1) A00247 Sealant - BMS 5-95, Class B
 B.  References
 (1)
09-11-00/201, Towing

 (2)
32-00-30/201, Landing Gear Door Locks

 (3)
IPC 57-15-04 Fig. 1

 C.  Access
 (1)  Location Zone 572 Landing Gear Support Beam and Rear Spar to Trailing Edge, Left
 672  Landing Gear Support Beam and Rear Spar to Trailing Edge, Right
 D.  Procedure
 S 492-011
 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).
 S 492-003
　
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