747-400 AMM 飞机维护手册 机翼 WINGS(55)

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Side Strut Fittings (Fig. 1)
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 A.  The landing gear side strut is attached to the fuselage structure by means of a spindle fitting. The spindle fitting is inserted through a side strut attach fitting which is fastened to the body station 1350 bulkhead. The attach fitting is fabricated from an aluminum alloy forged block, and is designed to carry landing gear side loads.
Strut Door Hinges (Fig. 2)
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A

747-400 MAINTENANCE MANUAL
WING REAR SPAR
SEE A SEE B SEE D
SEE C
LANDING GEAR SUPPORT BEAM 
WING GEAR SHOCK STRUT 
FWD 

TRUNNION
SPHERICAL BEARING
SHOCK 
STRUT 
TRUNNION SUPPORT 
LANDING GEAR  FITTING 
SUPPORT BEAM 

A

Wing Gear Attachment Fittings
Figure 1 (Sheet 1)

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A
747-400
MAINTENANCE MANUAL

WALKING BEAM
TRUNNION
ATTACH LUG
FORK
SPHERICAL BEARING
TRUNNION
WING REAR SPAR

FWD
DRAG BRACE
B
STATION 1350 BULKHEAD 
SUPPORT FITTING UPPER SPINDLE  WALKING BEAM SUPPORT FITTING 
WING REAR SPAR 
UPPER SIDE STRUT  WALKING BEAM SUPPORT 
FWD  C  WALKING BEAM 
WING GEAR ACTUATOR 

WALKING BEAM
FWD
D
Wing Gear Attachment Fittings
Figure 1 (Sheet 2)

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A

747-400
MAINTENANCE MANUAL

WING REAR SPAR
ROD BRACE
FORWARD HINGE SUPPORT FITTING
WING GEAR STRUT OUTBOARD DOOR
WING GEAR STRUT INBOARD DOOR
ROD BRACE
SEE A AFT HINGE SUPPORT FITTING
LANDING GEAR SUPPORT BEAM
SEE B
DOOR ATTACH RODS
FWD INBD
ROD BRACE
WING GEAR STRUT OUTBOARD DOOR ROD BRACE
FITTING 
HINGE SUPPORT  FWD 
INBD 
A 

FITTING
HINGE
SUPPORT

WING GEAR STRUT OUTBOARD DOOR
B
Wing Gear Door Attach Fittings
Figure 2

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.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

 A.  The wing landing gear strut doors are attached to wing structure by two hinge fittings installed on the outboard end of the outboard door. The door hinge fittings and the mating support hinge fittings are fabricated from forged aluminum alloy. The forward hinge support fitting is attached to the wing lower skin panel and inboard flap rear spar support fitting. The aft hinge support fitting is attached to the landing gear support beam lower chord and the flap track support fitting. Rod braces provide additional reinforcement to the hinge support fittings. The inboard door is attached to the outboard door by two aluminum hinge fittings and one titanium aft hinge fitting. Both doors are actuated by a rod-type actuator attached from the door to the drag brace actuator attach fitting and oleo actuator attach fittings.
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