(13)
 AIPC 28-22-07 FIG. 1

 (14)
 AIPC 28-22-07 FIG. 2

 (15)
 AIPC 28-22-07 FIG. 15

 (16)
 AIPC 28-22-07 FIG. 16

 (17)
 SWPM 20-20-00, Electircal Bond and Ground

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 28-22-07
 ALL  ú ú 01B Page 422 ú Oct 10/97
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 E.  Access
 (1)  
Location Zones
 452 Nacelle Strut 1 - Torque Box
 521 Nacelle Strut 1 - Leading Edge to Front Spar
 462 Nacelle Strut 2 - Torque Box
 521 Nacelle Strut 2 - Leading Edge to Front Spar
 472 Nacelle Strut 3 - Torque Box
 621 Nacelle Strut 3 - Leading Edge to Front Spar
 482 Nacelle Strut 4 - Torque Box
 621 Nacelle Strut 4 - Leading Edge to Front Spar

 (2)  
Access Panels
 415 Thrust Reverser Half - Engine 1
 416 Thrust Reverser Half - Engine 1
 521FT Wing Leading Edge Cover - Nacelle Strut 1
 425 Thrust Reverser Half - Engine 2
 426 Thrust Reverser Half - Engine 2
 521CT Wing Leading Edge Cover - Nacelle Strut 2
 435 Thrust Reverser Half - Engine 3
 436 Thrust Reverser Half - Engine 3
 611CT Wing Leading Edge Cover - Nacelle Strut 3
 445 Thrust Reverser Half - Engine 4
 446 Thrust Reverser Half - Engine 4
 621FT Wing Leading Edge Cover - Nacelle Strut 4

 F.  
Install the Fuel Line (from the Engine Disconnect to the Forward Wing Spar) (Fig. 402)

 S 424-041
 (1)  
Put the fuel tube(s) in the strut and hold the tube(s) in the correct position.

 S 424-042

 (2)  
Install the bolts, washers, nuts, end caps, spacers and shims (if used) that attach the clamp blocks to the support brackets (View I).

 NOTE: Do not tighten the clamps at this time.
____
 S 644-043
 (3)  Lubricate the new coupling O-rings with the petrolatum.
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 28-22-07
 ALL  ú ú 01B Page 423 ú Oct 10/97
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 S 434-044
 CAUTION:_______ DO NOT USE ANY TOOLS TO TIGHTEN THE FUEL LINE FITTINGS.  DAMAGE
 TO THE FITTING COMPONENTS OR LOOSENING OF THE ADJACENT FITTINGS
 CAN OCCUR.

 CAUTION: YOU CANNOT TIGHTEN THE FUEL LINE COUPLING AFTER THE INITIAL
_______ INSTALLATION. YOU MUST INSTALL NEW O-RINGS WHEN YOU TIGHTEN THE FUEL LINE COUPLING OR A FUEL LEAK CAN OCCUR.
 (4)  
FOR THE OUTBOARD STRUTS; Tighten these fuel tube(s) couplings (AMM 28-00-00/201):

 (a)  
Shrouded spar coupling (View F).

 1)  Connect the drain line to the shroud coupling body with the union and a new O-ring.

 (b)  
Shrouded bulkhead coupling (View E). 1) At the bulkhead fitting, tighten the jamnut to a torque value of 920 pound-inches

 2)  Connect the drain line to the shroud coupling body with the union and a new O-ring.

 (c)  
Flexible-full coupling (two locations) (View D).

 S 434-102
 (5)  
FOR THE INBOARD STRUTS; Tighten these fuel tube(s) couplings (AMM 28-00-00/201):

 (a)  
Spar coupling (View H).

 (b)  
Bulkhead coupling (View G).

 1)  At the bulkhead fitting, tighten the jamnut to a torque value of 920 pound-inches.

 (c)  
Flexible-full coupling (three locations) (View D).

 S 434-046
 (6)  Tighten the bolts that attach the fuel tube clamp blocks to the support brackets.
 NOTE: Make sure to replace the shims (if removed) from the support
____ clamps.
 S 434-047
 (7)  
Install the lockwire on the fuel coupling(s).

 S 434-048

 (8)  
Use lockwire to attach the bulkhead fitting jamnut and coupling body to the adjacent bolt on the forward and aft side of the bulkhead structure.
　
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