(7)
AMM 28-26-00/201, Defueling
(8)
AMM 28-44-00/001, Fuel Measuring Sticks
(9)
AMM 31-61-00/501, Integrated Display System (IDS)
(10)
AMM 34-61-02/401, Control Display Unit
(11)
AMM 45-10-00/201, Central Maintenance Computer System
C.
Access
(1)
Location Zones
221 Control Cabin, Left
222 Control Cabin, Right
521 Leading Edge to Front Spar, Left
(2)
Access Panel
521CB Refuel Control Panel Access Door
D.
Preconditions
S 865-311
(1)
These conditions are necessary for this task:
(a)
Fuel Quantity Indication System (FQIS) serviceable.
(b)
The procedures in this task require different fuel quantity configurations (empty tanks and tanks with some fuel in them).
(c)
Electrical Power On (AMM 24-22-00/201).
(d)
Fuel System Card File serviceable (AMM 28-22-16/401).
(e)
Defuel System Serviceable (AMM 28-26-00/201).
(f)
Intergrated Display System (IDS) serviceable (AMM 31-61-00/501).
(g)
Airplane must be in ground mode (AMM 32-09-02/201).
(h)
CDU installed (AMM 34-61-02/401).
(i)
Central Maintenance Computer (CMC) serviceable (AMM 45-10-00/501).
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747-400 MAINTENANCE MANUAL
E. Prepare for Test
S 865-064
(1)
Make sure the airplane is in the ground mode (airplane is not held up by jacks and targets not installed) (AMM 32-09-02/201).
S 805-021
(2)
Supply electrical power (AMM 24-22-00/201).
S 865-022
(3)
Make sure these circuit breakers are closed:
(a)
On the main power distribution panel, P6:
1) 6D5, FUEL QTY 1
2) 6D6, FUEL QTY 2
3) 6F5, FUEL SYS MGMT CARD A
4) 6F6, FUEL SYS MGMT CH 1
5) 6F7, FUEL SYS MGMT CARD B
6) 6F8, FUEL SYS MGMT CH 2
(b)
On the DC power distribution panel, P180:
1) 180M8, FUELING VALVE 2
2) 180M9, FUELING PWR - HOT BAT
3) 180C25, FUELING LTS PANEL
4) 180C26, FUELING LTS RECP
5) 180H17, FUELING SYS EICAS INTFC CONT
(c)
On the left power distribution center, P414:
1) 414F17, FUELING VALVE
2) 414F22, FUELING PWR
S 735-023
(4)
Examine the indicator lights on the fuel quantity processor unit (FQPU), M7860, in the center equipment center E6 rack.
(a)
Make sure the lights are on and the color is green.
NOTE: The LED indicator colors for the individual fuel
____ quantity card (IFQC) and input/output (I/O) cards are as follows:
GREEN - power supply is OK (does not indicate that the
card operates correctly)
RED - computer circuit card failure
DARK - there is no power at the card
S 715-156
(5) Do this procedure: Fuel Quantity Indication System Ground Test.
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747-400 MAINTENANCE MANUAL
F. Wet Tank Capacitance Test
S 865-055
(1) Make sure the fuel tanks are not empty and are not purged.
NOTE: The quantity of fuel in the tanks is not important.
____
S 865-056
(2)
Push the CDU MENU key to display the CDU menu (AMM 45-10-00/201).
S 865-057
(3)
Push the CDU line select key next to <CMC prompt to show the CMC menu.
S 865-058 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(100)
