(10)
Install the new packing in the inlet tube coupling.
S 424-104
(11)
Connect the coupling to the valve body.
S 424-105
(12)
Install the lockwire to connect the coupling nut to the outlet tube bolt head.
S 424-084
(13)
Install the refuel valve control unit in the center wing tanks (AMM 28-21-02/401).
S 414-085
(14)
Install the spanwise beam access doors (AMM 28-11-09/401).
S 414-086
(15)
Go out of and close the center wing fuel tank (AMM 28-11-00/201).
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
28-21-13
ALL ú ú 04 Page 409 ú Oct 10/91
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
FUELING RECEPTACLE ADAPTER - REMOVAL/INSTALLATION
_________________________________________________
1. General_______
A. This procedure contains instructions to remove and install the adapter for a refuel receptacle.
B. The refuel receptacle adapters are installed in the refuel nozzle connection end of the refuel receptacle. The refuel receptacles are at a location forward of the front spar in each wing.
C. If you open the refuel station access doors, you can get to the refuel receptacles.
D. If persons are in the area of the wing leading edge, make sure the safety locks are installed on all the extended leading edge flaps.
TASK 28-21-14-004-001
2. Refuel Receptacle Adapter Removal (Fig. 401)_________________________________
A. References
(1)
AMM 24-22-00/201, Manual Control
(2)
AMM 27-81-00/201, Leading Edge Flap System
(3)
AIPC 28-21-01, Fig. 50
B.
Access
(1)
Location Zones
521 Leading Edge to Front Spar, Left
621 Leading Edge to Front Spar, Right
(2)
Access Panels
521BB Refuel Receptacle Access Door
621BB Refuel Receptacle Access Door
C.
Procedure
S 864-002
(1) Remove the electrical power (AMM 24-22-00/201).
S 494-019
WARNING: CAREFULLY DO ALL THE SAFETY PROCEDURES IN THE LOCK INSTALLATION
_______ PROCEDURE (AMM 27-81-00/201). MAKE SURE YOU INSTALL THE LOCKS TO PREVENT THE ACCIDENTAL OPERATION OF THE FLAPS. THE FLAPS CAN QUICKLY RETRACT IN 7 SECONDS AND CAN CAUSE INJURY OR DAMAGE.
(2)
Install the leading edge flap safety locks if the flaps are extended (AMM 27-81-00/201).
(3)
Open the applicable refuel station access door, 521BB or 621BB.
(4)
Remove the refuel receptacle cap.
S 014-004
S 014-005
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28-21-14
ALL ú ú 01 Page 401 ú Feb 10/93
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 034-006
(5)
Remove the screws that attach the adapter to the receptacle (6 locations).
S 024-007
(6)
Remove the adapter and flange as one unit.
S 034-020
(7)
Discard the receptacle O-ring.
S 034-008
CAUTION:_______PUT PRESSURE AGAINST THE FLANGE WHILE YOU TURN THE FLANGE. THE FUELING RECEPTACLE ADAPTER IS SPRING-LOADED AND DAMAGE COULD OCCUR IF YOU DO NOT PUT PRESSURE AGAINST THE FLANGE.
(8)
Turn the flange in the counterclockwise direction to remove the flange from the adapter.
S 034-021
(9)
Discard the flange O-ring.
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