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FUEL SYSTEM
Description
Vol. 2 12−10−30
REV 74, Nov 07/08
CL−604 Operating Manual
PSP 604−6
EICAS MESSAGES
MESSAGE MEANING
APU PUMP APU fuel pump has failed.
APU SOV
APU fuel shutoff valve is open with the APU FIRE PUSH switch
activated, fuel shutoff valve position does not match the APU PWR
FUEL switch position, within 5 seconds.
APU NEG-G SOV
APU negative-’G’ shutoff valve is open with the APU FIRE PUSH switch
activated, or the negative-’G’ shutoff valve position does not match the
APU PWR FUEL switch position, within 5 seconds.
AUTO TAIL XFER Automatic function of the tail tank transfer has failed.
AUTO TAIL XFER INHIB Automatic function of the tail tank transfer is inhibited.
AUX TANK HEAVY Aux tank excessive fuel compared to the tail tank.
BULK FUEL TEMP Fuel temperature in the left main tank is below −37°C.
DUMP VALVE OPEN Fuel dump shutoff valve has been open longer than 5 minutes.
L ENG SOV The fuel shutoff valve is not closed after actuation of the respective
R ENG SOV engine fire push switch/light.
L FUEL FILTER
Respective fuel filter is in impending bypass mode.
R FUEL FILTER
FUEL IMBALANCE Fuel difference between the wing tanks is >800 lb (in flight) or >400 lb
(taxi/takeoff or approach).
L FUEL LO PRESS
Insufficient pressure at the respective engine pump inlet.
R FUEL LO PRESS
L FUEL LO TEMP
Fuel temperature at the respective engine pump is <5°C.
R FUEL LO TEMP
L FUEL PUMP
The respective electric boost pump has failed.
R FUEL PUMP
FUEL XFLOW SOV OPEN L/R crossflow shutoff valve is open and fuel imbalance is less than 100
lb.
PRI TAIL XFER PUMP In manual mode, the primary transfer pump has failed, or pump outlet
pressure is low, or fuel transfer is completed.
SEC TAIL XFER PUMP In manual mode, the secondary transfer pump has failed, or pump outlet
pressure is low, or fuel transfer is completed
L SCAV EJECTOR
Low output pressure at the respective scavenge ejector.
R SCAV EJECTOR
TAIL DUMP SOV Dump valve is not in agreement with the tail tank dump switch/light
position.
TAIL TANK HEAVY Tail tank excessive fuel compared to the aux tank fuel.
TAIL XFER SOV Transfer shutoff valve failed between full open and full closed
FUEL SYSTEM
Description
Vol. 2 12−10−31
REV 74, Nov 07/08
CL−604 Operating Manual
PSP 604−6
EICAS MESSAGES (CONT'D)
MESSAGE MEANING
TAIL XFER SOV CLSD
With either primary and/or secondary tail tank transfer pump pressures
output at an acceptable high level, the tail tank transfer SOV is not fully
open.
TAIL XFER SOV OPEN With either primary and/or secondary tail tank transfer pump pressures
low, the tail tank transfer SOV is not fully closed.
APU SOV CLOSED After APU fire push is activated, the fuel shutoff and negative-’G’ shutoff
valves are closed.
L ENG SOV CLOSED L engine fuel SOV closed after activation of respective fire push
switch/light.
R ENG SOV CLOSED R engine fuel SOV closed after activation of respective fire push
switch/light.
L FUEL PUMP ON L fuel pump on, with sufficient outlet fuel pressure.
R FUEL PUMP ON R fuel pump on, with sufficient outlet fuel pressure.
FUEL CH 1 FAIL
Respective channel in the fuel system computer has failed.
FUEL CH 2 FAIL
FUEL QTY ACCURACY
Both fuel system computer (FSC) channels have degraded accuracy
signal, or one FSC channel has degraded accuracy while the other
channel has a data word label invalid.
FUEL QTY ATT CORR Inertial reference system (IRS) is not valid for both channels of the
FSCU with airplane weight off wheels.
L MAIN EJECTOR FAIL Low fuel pressure at respective main ejectors, with respective engine
R MAIN EJECTOR FAIL running.
PRI TAIL XFER FAIL Primary tail xfer pump failed in auto mode.
SEC TAIL XFER FAIL Secondary tail xfer pump failed in auto mode.
TAIL RFL SOV OPEN Tail refuel SOV open with DC BUS 1 powered.
FUEL SYSTEM
Description
Vol. 2 12−10−32
REV 74, Nov 07/08
CL−604 Operating Manual
PSP 604−6
POWER SUPPLY AND CIRCUIT BREAKER SUMMARY
SYSTEM SUB-SYSTEM CB NAME BUS BAR
CB
PANEL
CB
LOCATION
NOTES
Fuel System
Fuel/Defuel
FUEL DEFUEL
FSCU
DC APU BATT
DIRECT
5
B5
FUEL DEFUEL L/R
AUX SOVS
B6
FUEL DEFUEL T/T
SOVS
B7
FUEL DEFUEL
PANEL
B8
FUEL DEFUEL
SOV POS
DC BUS 1 1 G8
Fuel Control
　
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