(e)
Do the test again for the right override/jettison pump in the center wing tank.
(f)
Push the switch on the fuel management control module for the No. 2 forward override/jettison pump to start the pump.
(g)
If there is fuel in the inboard tanks, make sure the low pressure light comes on momentarily and then goes off.
(h)
If the circuit breakers for the override/jettison pumps are open, make sure the low pressure light comes on.
NOTE: The low pressure light will stay on until the flight
____ deck switch is put in the off position.
(i)
Push the switch again to stop the pump.
(j)
Do the test again for the No. 2 aft override/jettison pump and the two No. 3 override/jettison pumps.
H.
Put the Airplane Back to Its Usual Condition
S 865-032
(1)
Remove the electrical power, if it is not necessary for a subsequent task (AMM 24-22-00/201).
S 865-052
(2)
Remove the DO-NOT-CLOSE tags and close these circuit breakers (if opened):
(a)
On the left DC power distribution panel, P414: 1) 414D2, FUEL OVRD/JSTN PUMP CTR LEFT 2) 414C2, FUEL OVRD/JSTN PUMP FWD 2 3) 414C5, FUEL OVRD/JSTN PUMP FWD 3
(b)
On the right DC power distribution panel, P415: 1) 415M32, FUEL OVRD/JSTN PUMP CTR RIGHT
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
28-42-00
ALL ú ú 01 Page 503 ú Feb 10/97
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
2) 415A38, FUEL OVRD/JSTN PUMP AFT 2
3) 415B38, FUEL OVRD/JSTN PUMP AFT 3
TASK 28-42-00-715-013
3. Fuel Boost Pump Low Pressure Indicating System Test___________________________________________________
A. References
(1)
AMM 07-11-08/201, Cargo and Fuel Loading Support
(2)
AMM 12-11-01/301, Fuel Servicing
(3)
AMM 24-22-00/201, Manual Control
(4)
AMM 28-26-00/201, Defueling
B.
Access
(1)
Location Zone
222 Control Cabin, Right
C.
Prepare for the Test
S 865-054
(1) Supply electrical power (AMM 24-22-00/201).
S 495-048
WARNING: USE THE TAIL SUPPORT EQUIPMENT IF YOU CANNOT KEEP THE CENTER OF
_______ GRAVITY IN THE LIMITS GIVEN BY THE WEIGHT AND BALANCE MANUAL. IF THE AIRPLANE CENTER OF GRAVITY IS NOT IN THESE LIMITS, THE AFT END OF THE AIRPLANE CAN HIT THE GROUND. INJURY TO PERSONS AND DAMAGE TO EQUIPMENT CAN OCCUR.
(2)
Install the tail support equipment if you can not keep the airplane center of gravity in the limits given by the weight and balance manual (AMM 07-11-08/201).
S 655-003
(3)
Make sure the main tanks each contain a minimum of 2,500 pounds (1,200 kilograms) of fuel.
S 655-026
(4)
Make sure the fuel is above the pump inlets.
NOTE: If the airplane is not level you can add more fuel to make
____ sure the fuel is above the pump inlets. Add fuel in increments of 1,000 pounds (460 kilograms) to 2,000 pounds (920 kilograms).
(a) If it is necessary, refuel the tank(s) (AMM 12-11-01/301) or move the fuel from one tank to a different tank (AMM 28-26-00/201).
S 865-056
(5) Make sure all the boost pump and the override/jettison pump switches (installed on the P5 pilots' overhead panel) are in the OFF position.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
28-42-00
ALL ú ú 04 Page 504 ú Feb 10/97
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 865-058
(6)
Make sure the FUEL CONTROL switches on the aisle stand are in the CUTOFF position.
S 865-060
(7) 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：747-400 AMM 飞机维护手册 燃油 FUEL 4(148)
