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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 S 492-008
 CAUTION:_______ WHEN YOU SUPPLY THE SHORING, PREVENT SCRATCHES TO THE SURFACE.
 ALSO, DO NOT PERMIT LOADS MORE THAN THOSE APPROVED FOR SHORING.
 IF YOU DO NOT OBEY THE CAUTION, YOU CAN CAUSE DAMAGE TO THE

 AIRPLANE.
 (3)  Assemble the necessary shoring (Fig. 203).
 NOTE: Contour data shown in Fig. 203 will help you when you
____ assemble the wing shoring.
 (a)  
Along the wing spars between the body buttock lines 150, and 430 and the landing gear beam 430, you can install the shoring with loads not more than these:

 ~...................................................... | Front Spar | 15,000 pounds per foot | | |(22,320 kg per meter) | ........................................................ | Mid Spar | 8,000 pounds per foot | | |(11,900 kg per meter) | ........................................................ | Rear Spar | 23,000 pounds per foot | | |(34,200 kg per meter) | ........................................................ | Landing Gear Support Beam | 24,000 pounds per foot | | |(35,700 kg per meter) | 2.............................…........................1

 (b)  
You can supply shoring below the spars or the landing gear support as padded beams on the jacks.

 S 492-009
 (4)  Shore the outboard nacelle with the engine support (Fig. 204) unless you removed the engine.
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A
747-400
MAINTENANCE MANUAL

WING REFERENCE

SECTION AT WING STATION

STATION WING  DIM. A  DIM. B  DIM. C 
557.42  11.92  162.00  14.48 
1028.0  4.70  107.85  4.89 
1485.0  5.68  58.30  1.85 

NOTE:  HOLD THE WING AT THE FRONT AND REAR SPAR CHORDS BY PADS OF NOT LESS THAN 80 SQUARE INCHES EACH. CHORDWISE DIMENSIONS OF PADS ARE EQUAL TO WIDTH OF SPAR CHORD.
Geometry for Wing Shoring
Figure 203

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MAINTENANCE MANUAL

64ME65B00713

ON BEAMS. MAKE SURE THE BEAMS HAVE SUFFICIENT SUPPORT FOR THE ENGINE WEIGHT. ATTACH THE ADAPTER AND YOKE ASSEMBLY  NOTE:____  THE FRONT AND REAR ADAPTER AND YOKE ASSEMBLIES ARE PART OF THE GROUND SUPPORT EQUIPMENT.
Engine Shoring Figure 204 

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