(14)
 WDM Chapter 20

 D. Access
 (1)  
Location Zone
 451 Nacelle Strut 1 - Forward Fairing
 452 Nacelle Strut 1 - Torque Box
 454 Nacelle Strut 1 - Aft Fairing
 521 Nacelle Strut 1 - Leading Edge to Front Spar
 461 Nacelle Strut 2 - Forward Fairing
 462 Nacelle Strut 2 - Torque Box
 464 Nacelle Strut 2 - Aft Fairing
 521 Nacelle Strut 2 - Leading Edge to Front Spar
 471 Nacelle Strut 3 - Forward Fairing
 472 Nacelle Strut 3 - Torque Box
 474 Nacelle Strut 3 - Aft Fairing
 621 Nacelle Strut 3 - Leading Edge to Front Spar
 481 Nacelle Strut 4 - Forward Fairing
 482 Nacelle Strut 4 - Torque Box
 484 Nacelle Strut 4 - Aft Fairing
 621 Nacelle Strut 4 - Leading Edge to Front Spar

 (2)  
Access Panel
 454 Trailing Edge Fairing Door - Nacelle Strut 1
 521FT Wing Leading Edge Cover - Nacelle Strut 1
 464 Trailing Edge Fairing Door - Nacelle Strut 2
 511CT Wing Leading Edge Cover - Nacelle Strut 2
 474 Trailing Edge Fairing Door - Nacelle Strut 3
 611CT Wing Leading Edge Cover - Nacelle Strut 3
 484 Trailing Edge Fairing Door - Nacelle Strut 4
 621FT Wing Leading Edge Cover - Nacelle Strut 4

 E. Prepare for the Removal (Fig. 401 and 402)
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
SEE C
SEE B
SEE A
SEE A
MIDSPAR FUSE PIN  WEB
HYDRAULIC
(2 PLACES)  (NAC
RESERVOIR STA 456)
A/C MOTOR -DRIVEN PUMP

1
DIAGONAL BRACE
CLAMP
(TYP)
PNEUMATIC
TUBE
2
HYDRAULIC HOSE
DIAGONAL BRACE AIR DRIVENFORWARD ATTACH PUMPPIN
WING-TO-STRUT DISCONNECTS ACCESSED
THROUGH TRAILING EDGE FAIRING DOORS

A
INBOARD STRUTS1 OUTBOARD STRUTS2
Nacelle Strut Access
Figure 401 (Sheet 1)

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
WING ANTI-ICING DUCT
FIRE EXTINGUISHING TUBE TUBE NUT
CLAMP
PNEUMATIC UPPER LINKTUBE
ELECTRICAL CONNECTORS
GROUND HYDRAULIC CASE
LEAD DRAIN TUBE
(TYP)
GENERATOR POWER FEED LINES CLAMP
COUPLING  TUBE NUTS 
FUEL SUPPLY TUBE  SUPPLY TUBE CLAMP HYDRAULIC T/R  RETURN TUBE HYDRAULIC T/R 
FWD 

WING-TO-STRUT DISCONNECTS ACCESSED THROUGH WING LEADING EDGE COVER - OUTBOARD STRUT
B
PNEUMATIC TUBE FIRE EXTINGUISHING TUBE
WING ANTI-ICING DUCT UPPER LINK
TUBE NUT
GENERATOR POWER ELECTRICAL
FEED LINES
CONNECTORS HYDRAULIC CASE DRAIN TUBE
COUPLING CLAMP
CLAMP
FUEL SUPPLY
TUBE NUTS
TUBE
HYDRAULIC T/R HYDRAULIC T/R
FWD SUPPLY TUBE RETURN TUBE
WING-TO-STRUT DISCONNECTS ACCESSED THROUGH WING LEADING EDGE COVER - INBOARD STRUT
C
Nacelle Strut Access Figure 401 (Sheet 2)
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

TRACE
NAC

A-A REMOVE FROM STRUT NO. 1 ONLY
REMOVE FROM STRUT NO. 4 ONLY
Nacelle Strut Access Figure 401 (Sheet 3)
E56023
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