(9)
Apply the fillet seal around the valve base.
S 394-020
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747-400 MAINTENANCE MANUAL
S 394-052
(10)
Apply the sealant around the base and over the top of the nuts (AMM 28-11-00/801).
S 434-021
(11)
On the fuel sump drain valve with the drain line, put the new packing on the fitting and install the fitting on the valve housing.
S 434-045
(12)
Tighten the fitting.
S 434-022
(13)
On the fuel sump drain valve with the drain line fitting, connect the drain line coupling to the fitting on valve housing.
S 434-046
(14)
Tighten the coupling.
S 414-023
(15)
If you replace the sump drain valve in the center wing tank, install the access door No. 3131AZ for the spanwise beam (AMM 28-11-09/401).
S 864-024
(16)
Get out of the tank and close the tank (AMM 28-11-00/201).
S 654-025
(17)
If the sump drain valve in the fuel tank was replaced, fill the applicable fuel tank with fuel (AMM 12-11-01/301).
(18)
Make sure the sump drain valve does not have a leak.
S 794-026
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747-400 MAINTENANCE MANUAL
MID SPAR ACCESS DOOR - REMOVAL/INSTALLATION
___________________________________________
1. General_______
A. This procedure contains instructions for the removal and installation of the mid spar access door(s).
B. The access doors are found in the fuel tank on the mid spar web of the wing. The mid spar access door installation is the same for all locations.
C. To remove a mid spar access door, you must defuel and purge the
applicable outboard main tank.
TASK 28-11-25-004-002
2. Mid Spar Access Door Removal____________________________
A. References
(1)
AMM 28-11-00/201, Fuel Tanks
(2)
AMM 28-11-02/401, Main Tank Access Door
B.
Access
(1)
Location Zones
546 Outbd Main Tank , Mid Spar, Left
552 Outbd Main Tank , Mid Spar, Left
646 Outbd Main Tank, Mid Spar, Right
652 Outbd Main Tank, Mid Spar, Right
(2)
Access Panels
546BZ Outbd Main Tank , Mid Spar, Left
552AZ Outbd Main Tank , Mid Spar, Left
552BZ Outbd Main Tank, Mid Spar, Left
552CZ Outbd Main Tank, Mid Spar, Left
552DZ Outbd Main Tank, Mid Spar, Left
552EZ Outbd Main Tank, Mid Spar, Left
552FZ Outbd Main Tank, Mid Spar, Left
552GZ Outbd Main Tank, Mid Spar, Left
552HZ Outbd Main Tank, Mid Spar, Left
646BZ Outbd Main Tank, Mid Spar, Right
652AZ Outbd Main Tank, Mid Spar, Right
652BZ Outbd Main Tank, Mid Spar, Right
652CZ Outbd Main Tank, Mid Spar, Right
652DZ Outbd Main Tank, Mid Spar, Right
652EZ Outbd Main Tank, Mid Spar, Right
652FZ Outbd Main Tank, Mid Spar, Right
652GZ Outbd Main Tank, Mid Spar, Right
652HZ Otbd Main Tank, Mid Spar, Right
C.
Remove the Mid Spar Access Door
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747-400
MAINTENANCE MANUAL
LEFT WING SHOWN
(RIGHT WING OPPOSITE)
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本文链接地址：747-400 AMM 飞机维护手册 燃油 FUEL 1(130)
