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direction of the crossflow pump motor.
If the powered crossflow system fails, the flight crew can open the gravity crossflow
shutoff valve to allow fuel transfer by gravity between wing tanks. Gravity crossflow can
be enhanced by using a sideslip maneuver.
NOTE
If crossflow operations is being carried out in manual
mode (Auto Override selected), only the required L or
R XFLOW switchlight should be selected, not both. If
both XFLOW switches are selected, power will be
removed from the crossflow pump and the XFLOW
PUMP caution message will come on. Also, both
XFLOW FAIL switchlights will illuminate. The manual
crossflow function will be inhibited until one of the
XFLOW switches is deselected or the AUTO
OVERRIDE switchlight is deselected.
Vol. 1 13--30--2
FUEL SYSTEM
Fuel Management REV 3, May 03/05
Flight Crew Operating Manual
CSP C--013--067
Fuel Transfer and Crossflow System
Figure 13---30---1
Fuel Control Panel
Overhead Panel
XFLOW
L AUTO OVERRIDE R
L BOOST
PUMP
R BOOST
PUMP
F
U
E
L
GRAVITY
XFLOW
ON
FAIL
ON
INOP
MAN
OPEN
FAIL
ON
FAIL
ON
INOP
GRAVITY XFLOW
Used to control gravity crossflow.
OPEN (white) light indicates
gravity crossflow is selected on.
FAIL (amber) light indicates that
the gravity crossflow shut--off
valve is not in the selected
position.
XFLOW AUTO OVERRIDE
Used to override automatic
powered crossflow.
MAN (white) light indicates
manual powered crossflow
is armed.
L and R XFLOW
Used to control powered crossflow
in manual mode.
ON (white) light indicates
powered crossflow is operating
in the indicated direction.
FAIL (amber) light indicates that
powered crossflow has failed.
FORWARD
SCAV
EJECT PRIME
FEED
EJECT
XFER
EJECT
MOTIVE
FLOW
LEFT ENGINE
FMU
COLLECTOR TANK
AFT
SCAV
EJECT
GRAVITY
XFLOW SOV
FORWARD
SCAV
PRIME EJECT
FEED
EJECT
XFER
EJECT
MOTIVE
FLOW
RIGHT ENGINE
FMU
COLLECTOR TANK
AFT
SCAV
EJECT
XFLOW
PUMP
E
E
XFLOW
INLET
SCREEN
FUEL
XFER
SOV
FUEL QUANTITY
GAUGING COMPUTER
E
P P
P
Vol. 1 13--30--3
FUEL SYSTEM
Fuel Management Sep 09/02
Flight Crew Operating Manual
CSP C--013--067
Fuel --- EICAS --- Synoptic Page <1001>
Figure 13---30---2
MANUAL XFLOW (white)
Indicates that manual
crossflow has been
selected.
Fuel Page
Gravity Crossflow Valve
Position Indicator
Transfer Ejectors
White -- Center tank is
empty or respective
transfer shut--off valve
is closed or respective
engine not running.
Green -- Ejector
operating at normal
pressure with fuel in
center tank.
Amber -- Low pressure
at respective transfer
ejector with respective
engine running.
Half Intensity Magenta
-- Invalid data.
AUTO BAL INHIB (white)
Indicates that powered
crossflow is inhibited in
automatic mode.
Powered Crossflow Pump
White -- Pump is off.
Green -- Pump is
operating. Arrow
indicates flow direction.
Amber -- Pump has failed.
Half Intensity Magenta --
Invalid data.
invalid data
(half--intensity magenta)
failed to attain
commanded position (white)
closed (white)
open (white)
open (white)
Valve outline will turn amber
if valve fails to attain
commanded position.
Transfer Shut--off Valve
Position Indicators
closed (white)
invalid data
(half--intensity magenta)
55 55
--25
FUEL
APU
2200
P
TOTAL FUEL FUEL USED
MANUAL
XFLOW
C C
C
2200 KG KG
1750 KG
1070 KG
5470 KG
P
P
BRT
Vol. 1 13--30--4
FUEL SYSTEM
Fuel Management Sep 09/02
Flight Crew Operating Manual
CSP C--013--067
Fuel System --- EICAS Indications <1001>
Figure 13---30---3
L XFER SOV
R XFER SOV
FUEL IMBALANCE
XFLOW PUMP
GRAV XFLOW OPEN
GRAV XFLOW FAIL
LAUTO XFLOW ON
R AUTO XFLOW ON
L XFLOW ON
R XFLOW ON
MAN XFLOW
AUTO XFLOW INHIB
XFLOW PUMP caution (amber)
Indicates that the crossflow pump
has failed.
FUEL IMBALANCE caution (amber)
　
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