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P604_12_006
FUEL SYSTEM
For Training Purposes Only
Jan 04
12-33
P I LOT T R A I N I N G GU I D E
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, or the
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 engine fire push
R ENG SOV 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.
EICAS Messages
Table 12-4
FUEL SYSTEM
12-34 For Training Purposes Only
Jan 04
P I LOT T R A I N I N G GU I D E
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 position.
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 ejector, with respective engine running.
R MAIN EJECTOR FAIL
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.
MESSAGE MEANING
EICAS Messages
Table 12-4
Table of Contents
For Training Purposes Only
May 03
13-i
P I LOT T R A I N I N G GU I D E HYDRAULIC POWER
Introduction .......................................................................................................................13-1
Systems 1 and 2 ...............................................................................................................13-2
Description ..................................................................................................................13-2
Components and Operation........................................................................................13-2
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