(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
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.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.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.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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