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represents the right engine on speed.
The FUEL synoptic page below represents airplane configuration with the APU shut
down, both engines on, the AC pumps running, and the DC pumps on standby.
P P P
P
P P
P
P
FUEL
AUX
23°C
APU
23°C
TOTAL FUEL
353OOLBS
146OOLBS
AUX
61OOLBS
146OOLBS
FUEL USED
3OOLBS
LO PRESS
32°C 32°C
LO PRESS
GX_appx_013
P P P
P
P P
P
P
FUEL
AUX
23°C
APU
23°C
TOTAL FUEL
353OOLBS
146OOLBS
AUX
61OOLBS
146OOLBS
FUEL USED
3OOLBS
LO PRESS
32°C 32°C
LO PRESS
P P P
P
P P
P
P
FUEL
AUX
23°C
APU
23°C
TOTAL FUEL
353OOLBS
146OOLBS
AUX
61OOLBS
146OOLBS
FUEL USED
3OOLBS
LO PRESS
32°C 32°C
LO PRESS
GX_appx_014
For Training Purposes Only
Sept 04
Appx-31
P I LOT T R A I N I N G GU I D E
GLOBAL 5000 DIFFERENCES
APPENDIX 1
TRANSFER SYSTEM
Fuel contained in the center tank cannot be fed directly to the engine, but must be first
delivered to the feed tanks by the transfer pumps. The normal sequence of fuel usage is
to transfer center tank fuel into the wings as required, to keep the wings full during
climb and cruise. After depletion of center tank fuel quantity, no further transfer of
fuel is required, since all remaining fuel is contained in the wing tanks.
Control of fuel transfer from the center tank is normally under control of the fuel
computer. There is no manual override for the center tank transfer system.
CENTER TRANSFER
Fuel transfer from the center tank to wing tank is completely automatic through the
control of the FMQGC. The FMQGC monitors the fuel level and quantities in the
wing tank (using fuel probes, compensators, densitometers, and temperature sensors)
to control fuel transfer from the center tank to the wing tanks. Fuel will be transferred
from the center tank and delivered to the wing feed tanks, through the use of two
center transfer pumps.
The FMQGC will start the applicable center transfer pump(s) when each individual
wing tank reaches approximately 93% of its fuel tank capacity. The FMQGC will
automatically stop the center transfer pump(s) when the respective wing tank reaches
greater than 97%, of its fuel tank capacity.
The FUEL synoptic page represents the center tank transfer system in operation, with
both engines running.
P P P
P
P P
P
P
FUEL
AUX
23°C
APU
23°C
TOTAL FUEL
331OOLBS
135OOLBS
AUX
61OOLBS
135OOLBS
FUEL USED
52OOLBS
LO PRESS
32°C 32°C
LO PRESS
Center Transfer
Pumps
GX_appx_015
P I LOT T R A I N I N G GU I D E
GLOBAL 5000 DIFFERENCES
APPENDIX 1
Appx-32 For Training Purposes Only
Sept 04
WING TRANSFER
The wing transfer system permits fuel to be pumped from either side of the airplane to
the other, using the DC auxiliary pumps and motor operated shutoff valves.
The wing transfer system provides a means of correcting lateral fuel imbalance. It may
be used in automatic mode via FMQGC, or manual mode as selected by the cockpit
fuel control panel. Fuel imbalance at a predetermined value will be annunciated on the
EICAS display in the form of a caution message.
AUTO WING TRANSFER
The auto wing transfer mode is only enabled when the slat/flap handle is in the in/zero
position. In this mode, the FMQGC will correct lateral fuel imbalances of 400 pounds
on ground and in flight. The FMQGC will control and operate the DC auxiliary pumps
and wing transfer SOVs as necessary, to pump fuel from the feed tank into the
opposite wing. Once commanded on, the wing transfer system remains on until lateral
fuel imbalance is zero.
In the event of a center tank transfer pump failure, fuel will be transferred from the
operating center tank transfer pump to its respective wing tank. The automatic wing
transfer system will maintain lateral fuel balance, to ensure that fuel contained in the
center tank is available to both engines.
MANUAL WING TRANSFER
In manual mode, the wing transfer system is controlled using the fuel WING XFER
switch. Once selected, the wing fuel transfer continues until the WING XFER switch
is selected off on the fuel control panel. The FUEL synoptic page represents the left to
right wing transfer mode of operation with both engines running.
　
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