S 735-158
(26)
Put these override/jettison pump switches for the center wing tank to the off position (the white ON indication light in each switch does not show):
(a)
L CTR
(b)
CTR R
S 735-159
(27)
Monitor the fuel synoptic.
(a)
Make sure the pump box symbols for the override/jettison pumps for the center wing tank change color in this sequence: 1) Magenta pump box (pump on - pressure) 2) Amber (pump on - low pressure) (momentarily) 3) White (pump off)
(b)
Make sure the magenta jettison flow bars do not show between the symbols for the two override/jettison pumps in the center wing tank and the jettison nozzles.
S 735-153
(28)
Put the refuel valve switches for the No. 2 and No. 3 main tanks, MAIN 2 and MAIN 3, (P42 panel) to the CLOSED position.
(29)
Put the FUEL JETTISON control selector switch in the OFF position.
(30)
Make sure TO REMAIN on the main EICAS display is replaced with TEMP.
S 735-124
(31)
Open these circuit breakers and install DO-NOT-CLOSE tags:
(a)
On the P6 panel:
1) 6C18, JTSN NOZZLE VLV CONT R
2) 6D18, JTSN NOZZLE VLV CONT L
S 735-154
S 735-155
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A
747-400 MAINTENANCE MANUAL
S 735-125
(32)
Put the FUEL JETTISON L-NOZZLE and NOZZLE-R switches on the fuel jettison module to the closed position (the white ON indication light in each switch does not show).
S 095-175
(33)
Remove the jumper wires from the electrical connectors for the left and right nozzle valves, DV49, and DV56.
S 435-136
(34)
Connect the electrical connectors DV49 and DV56 to the left and right actuators for the nozzle valves.
S 415-137
(35)
Close these access doors.
(a)
556BA Wingtip Dry Bay Access Door
(b)
656BA Wingtip Dry Bay Access Door
S 865-135
(36)
Close these circuit breakers and remove the DO-NOT-CLOSE tags:
(a)
On the P6 panel,
1) 6C18, JTSN NOZZLE VLV CONT R
2) 6D18, JTSN NOZZLE VLV CONT L
S 715-127
(37)
Do the "Fuel Jettison Nozzle Valve Test" procedure.
G.
Put the Airplane Back to Its Usual Condition
S 095-190
WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF THE LEADING
_______ EDGE AND TRAILING EDGE FLAPS AND FLAP DRIVE MECHANISMS BEFORE YOU MOVE THE FLAP CONTROL LEVER. WITH HYDRAULIC POWER REMOVED, THE FLAPS WILL MOVE AUTOMATICALLY BY ELECTRICAL POWER WHEN YOU MOVE THE FLAP CONTROL LEVER.
(1)
Retract the leading edge flaps, if extended (AMM 27-81-00/201).
S 415-140
(2)
Close the access door 521CB for the refuel control panel, P42 if access to the refuel control panel is not needed.
(3)
Remove electrical power if it is not necessary (AMM 24-22-00/201).
S 865-080
TASK 28-31-00-715-173
9. Fuel Jettison Transfer Valve Test - Operational Test____________________________________________________
A. General
(1) This task is for digital task card requirements.
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747-400
MAINTENANCE MANUAL
(2)
This task does a CMC ground test to make sure these fuel transfer valves operate corrrectly:
(a)
Fuel jettison transfer valve for the center wing tank (left)
(b)
Fuel jettison transfer valve for the center wing tank (right)
(c)
Fuel jettison transfer valve for the No. 2 main tank
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本文链接地址：747-400 AMM 飞机维护手册 燃油 FUEL 4(22)
