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3 Crossfeed (X FEED) Valve Switches 1 and 4
ON (bar visible) - crossfeed valve opens.
4 Crossfeed VALVE Lights 1 and 4
Illuminated (amber) - crossfeed valve position does not agree with switch
position.
5 Center (CTR)Wing Tank Pump Switches
ON - fuel pump selected ON.
Off (ON not visible) - fuel pump selected OFF.
6 MAIN Pump Switches
ON – fuel pump selected ON.
Off (ON not visible) – fuel pump selected off.
VALVE
1 2
MAIN 1 OVRD 2 MAIN
FUEL
X FEED
L CTR R
ON
ON
ON
ON
ON
ON
ON ON
VALVE
PRESS PRESS
PRESS PRESS PRESS
PRESS PRESS PRESS
VALVE
3 4
MAIN 4
FUEL
X FEED
ON
ON
ON
ON
ON
ON
VALVE
PRESS PRESS PRESS
PRESS PRESS PRESS
ON
PRESS PRESS
L STAB R
MAIN 3 OVRD
ON
F
T
F
A
D
W
F
T
F
A
D
W
OVERHEAD PANEL
3
4
1
9 8
5
6
7
2
December 01, 1999
747 Operations Manual
Copyright © The Boeing Company. See title page for details.
12.10.2 D6-30151-425
Fuel -
Controls and Indicators
7 Forward (FWD) and AFT Fuel Pump Pressure (PRESS) Lights
Illuminated (amber) – fuel pump output pressure low.
8 Override (OVRD) Fuel Pump Switches
ON - fuel pump operates when commanded by system logic.
Off (ON not visible) - fuel pump selected off.
9 Stabilizer (STAB) Tank Pump Switches
ON - fuel pump operates when commanded by system logic.
Fuel Jettison System
1 FUEL TO REMAIN Selector
Rotate –
• selects fuel to remain after jettison
• displays value on EICAS
2 Fuel Jettison NOZZLE Valve Switches
ON -
• jettison nozzle valve selected open
• when jettison system armed, activates override/jettison and transfer/
jettison pumps in tanks containing fuel (pump switches must be ON)
Off - jettison nozzle valve selected closed.
JETTISON
FUEL
L-NOZZLE-R
ON
VALVE
ON
VALVE
B
A
OFF
FUEL TO REMAIN
DO NOT JETT
WITH FLAPS
IN TRANSIT
BETWEEN
1 & 5
3
2
4
1
OVERHEAD PANEL
December 01, 1999
747 Operations Manual
Fuel -
Controls and Indicators
Copyright © The Boeing Company. See title page for details.
D6-30151-425 12.10.3
3 Fuel Jettison Nozzle VALVE Lights
Illuminated (amber) – jettison nozzle valve not in selected position.
4 Fuel Jettison Selector
OFF –
• disarms jettison system
• removes EICAS fuel to remain indication
A or B –
• armsjettisonsystem
• displays preselected fuel to remain on EICAS
Miscellaneous Fuel Control
Defuel Panel
1 Reserve (RSV) 2 & 3 Transfer (XFER) Switch
CLOSE -
• reserve 2 and 3 transfer valves closed
• reserve 2 and 3 transfer valves open when commanded by system logic
OPEN - reserve 2 and 3 transfer valves open.
2 CenterWing Tank (CWT) SCAVENGE PUMP
ON - pump operates.
OFF - pump operates when commanded by system logic.
GROUND
TO USING ON
MANUAL PRIOR
SEE OPERATIONS
RESERVE 2 & 3
PUMP
CWT SCAVENGE
OPEN
CLOSE
ON
OFF
XFER
DEFUEL
2
OVERHEAD MAINTENANCE PANEL
1
December 01, 1999
747 Operations Manual
Copyright © The Boeing Company. See title page for details.
12.10.4 D6-30151-425
Fuel -
Controls and Indicators
Fuel Transfer Main 1 & 4 Switch
1 FUEL Transfer (XFER) MAIN 1 & 4 Switch
ON - main 1 and 4 transfer valves open.
Off -
• main 1 and 4 transfer valves closed
• main 1 and 4 transfer valves open when commanded by system logic
Fuel Indications and Displays
Normal Fuel Indications
1 Normal Fuel Indications
Total fuel quantity (kilograms x 1000).
Fuel temperature (degrees Celsius).
Amber - fuel temperature is -37°C and below.
OVERHEAD PANEL
FUEL XFER
MAIN 1 & 4
1 ON
163.0 KGS X
TEMP +10c
TOTAL FUEL
1000
EICAS DISPLAY
1
December 01, 1999
747 Operations Manual
Fuel -
Controls and Indicators
Copyright © The Boeing Company. See title page for details.
D6-30151-425 12.10.5
Compacted Fuel Indications
1 Compacted Fuel Indications
Compacted fuel quantity indications display on primary EICAS if only one CRT
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波音747-441操作手册2(111)
