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alternating current or AC primary pumps, and one Direct Current (DC) backup (or
Aux) electrical boost pump. The transfer system maintains the feed tanks full during
all attitudes, and provides automatic transfer of fuel from the center tank and aft tank
to the main wing tanks.
Lateral balance between left and right main tanks is controlled automatically by the
Fuel Management and Quantity Gauging Computer (FMQGC), or manually through
switch selections in the flight compartment.
GX_appx_001
Main Wing Tank
Engine Driven
Pumps
Feed Tanks
DC Pumps
(start, emergency
and wing transfer)
AC Motor Pumps
(transfer)
AC Motor Pumps
(engine feed)
Center Tank
P I LOT T R A I N I N G GU I D E
GLOBAL 5000 DIFFERENCES
APPENDIX 1
Appx-14 For Training Purposes Only
Sept 04
Flight deck control is provided on the overhead panel, and fuel quantity and warnings
are displayed on EICAS.
A single point pressure refuel/defuel adapter is provided which is connected to a
manifold containing shutoff valves. Pressure refueling can be done either
automatically or manually. Gravity filling is provided for each wing tank and for the
center tank.
A dual channel FMQGC continuously monitors the following:
• Fuel quantity indicating
• Left, right engine and APU feed
• Wing to wing balance (wing XFER)
• Center tank transfer
• Refuel/Defuel
Any fault detected by the fuel system computer is annunciated on Engine Indication
and Crew Alerting System (EICAS) in the form of a visual and/or aural alert, and/or
maintenance diagnostics.
FUEL TANKS
All fuel is carried in three integral tanks (left wing, right wing and center wing).
The inboard section of each wing is designated as a feed tank, from which each engine
draws its fuel. Fuel flows from the outboard sections of each wing tank, into the feed
tank (by gravity), through swing check valves in the baffles of each main tank. The
check valves allow fuel flow in the inboard direction only. This will restrict large fuel
movements, and limit center of gravity shifts in airplane changes of attitude. Fuel is
also transferred into the feed tanks, from the center fuselage by the transfer system.
DESCRIPTION
FUEL SPECIFICATIONS
For information on fuel additives, temperature limitations and approved fuels, refer to
AFM - LIMITATIONS Chapter 2.
Fuel remaining in a tank when the appropriate fuel quantity indicator reads zero is not
usable. Based upon a fuel density of 6.75 lb/U.S. gallon, the maximum usable fuel
load for each fuel tank is given below:
PRESSURE REFUEL (+0 / -1% WING TANKS, +0 / -2% CENTER TANK)
Tank Volume Fuel Mass †
Left main tank 8,435 liters 2,229 U.S. gal 6,825 kg 15,050 lb
Right main tank 8,435 liters 2,229 U.S. gal 6,825 kg 15,050 lb
For Training Purposes Only
Sept 04
Appx-15
P I LOT T R A I N I N G GU I D E
GLOBAL 5000 DIFFERENCES
APPENDIX 1
Center tank 3,418 liters 903 U.S. gal 2,775 kg 6,100 lb
Total 20,288 liters 5,361 U.S. gal 16,425 kg 36,200 lb
† based on a fuel density of 0.809 kg/liter (6.75 lb/U.S. gal), rounded to the nearest 25 kg or 50 lb. Fuel Mass is
provided for reference only and should not be considered limiting.
GRAVITY REFUEL (AIRPLANE LEVEL)
Tank Volume Fuel Mass †
Left main tank 7,760 liters 2,050 U.S. gal 6,275 kg 13,850 lb
Right main tank 7,760 liters 2,050 U.S. gal 6,275 kg 13,850 lb
Center tank 3,142 liters 830 U.S. gal 2,550 kg 5,600 lb
Total 18,662 liters 4,930 U.S. gal 15,100 kg 33,300 lb
† based on a fuel density of 0.809 kg/liter (6.75 lb/U.S. gal), rounded to the nearest 25 kg or 50 lb. Fuel Mass is
provided for reference only and should not be considered limiting.
PRESSURE REFUEL (+0 / -1% WING TANKS, +0 / -2% CENTER TANK)
P I LOT T R A I N I N G GU I D E
GLOBAL 5000 DIFFERENCES
APPENDIX 1
Appx-16 For Training Purposes Only
Sept 04
FUEL AND WATER DRAINS
All tanks have flush self-closing water drain valves, installed at various low points, to
permit draining of any accumulated water or residual fuel. They are located at the low
point of each wing. Three gravity fill caps are provided for wing and center tank
gravity refueling.
Center Fuel Tank
Water Drains
Gravity Fuel Fill
Wing Fuel Tank
and Water Drain
Center Wing
Gravity Fuel Fill
Wing Fuel Tank
and Water Drain
Wing Fuel Tank
Gravity Fuel Fill
LEGEND
UPPER SURFACE
LOWER SURFACE
GX_appx_002
For Training Purposes Only
Sept 04
Appx-17
P I LOT T R A I N I N G GU I D E
　
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