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to feed both engines.
Continued on next page
[] FUEL PRESS ENG L, R
Condition: The engine is on suction feed.
Note: At high altitude, thrust deterioration or an
engine flameout may occur
Able to maintain the required thrust on the
affected engine:
Unable to maintain the required thrust on the
affected engine:
Go to step 4
Note: Continued operation with a crossfeed valve
open will result in a progressive fuel
imbalance due to both engines feeding from
the same main tank.
December 10, 2007
777 Flight Crew Operations Manual
Copyright © The Boeing Company. See title page for details.
D632W001-TBC 12.25
12.25
5 Do not balance fuel.
6 When the FUEL IMBALANCE message shows:
FUEL CROSSFEED switches (both) . . . . . . . Off
Continue suction feed operation. Sufficient roll
control is available to compensate for any main
tank fuel imbalance.
If unable to maintain required thrust on the
affected engine, descend to a lower altitude.
FUEL PRESS ENG L, R continued
FUEL PRESS ENG L+R
Condition: Both engines are on suction feed.
December 10, 2007
777 Flight Crew Operations Manual
Copyright © The Boeing Company. See title page for details.
D632W001-TBC
12.26
12.26
1 FUEL CROSSFEED switch (either) . . . . . . . . . . On
2 Fuel CENTER PUMP switch (affected pump) . . .Off
3 Choose one:
4 FUEL CROSSFEED switches (both) . . . . . . . . .Off
5 Check that available left and right main tank
quantity is sufficient for the planned flight. The
center tank fuel is not available.
1 Fuel PUMP switch (affected pump) . . . . . . . . .Off
1 Fuel PUMP switch (affected pump) . . . . . . . . .Off
[] FUEL PUMP CENTER L, R
Condition: The pump pressure is low.
At least one center fuel pump output pressure is
normal:
Both center fuel pump output pressures are low:
Go to step 4
[] FUEL PUMP L AFT, FWD
Condition: The pump pressure is low.
[] FUEL PUMP R AFT, FWD
Condition: The pump pressure is low.
December 10, 2007
777 Flight Crew Operations Manual
Copyright © The Boeing Company. See title page for details.
D632W001-TBC 12.27
12.27
1 The FUEL QTY LOW message may be caused by an
engine fuel leak. For indications of an engine fuel
leak, check:
The total fuel remaining on EICAS compared to
the planned fuel remaining.
The fuel flow displays, for an engine with an
excessive fuel flow.
The individual tank quantities.
The totalizer compared to calculated quantities
(PROGRESS page 2). The TOTALIZER value is
the sum of the individual tank quantities. The
CALCULATED value is the totalizer value at
engine start minus fuel used (calculated using
fuel flow rates and time).
2 Choose one:
Continued on next page
[] FUEL QTY LOW
Condition: The fuel quantity is low in a main tank.
Objective: To check for indications of a fuel leak and
ensure that all fuel is available for use.
There is an indication of an engine fuel leak:
Go to the Fuel Leak checklist on
page 12.16
There is no indication of an engine fuel leak and
the FUEL DISAGREE message shows:
Go to step 3
December 10, 2007
777 Flight Crew Operations Manual
Copyright © The Boeing Company. See title page for details.
D632W001-TBC
12.28
12.28
3 FUEL CROSSFEED switch (either) . . . . . . . . . . On
This ensures that fuel is available to both
engines if the low tank empties.
[Auxiliary Fuel Tank]
4 AUX fuel switch . . . . . . . . . . . . . . . . . . . . . .ON
5 Fuel PUMPS switches (all) . . . . . . . . . . . . . . .ON
This ensures that all fuel is available for use.
6 Plan to land at the nearest suitable airport.
7 GND PROX FLAP OVRD switch . . . . . . . . . .OVRD
8 Checklist Complete Except Deferred Items
Descent Checklist
Recall . . . . . . . . . . . . . . . . . . . . . . . . . . Checked
Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . Checked
Autobrake . . . . . . . . . . . . . . . . . . . . . . . . . . ___
Landing data . . . . . . . . VREF 20, Minimums ___
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波音777快速检查单 Quick Reference Handbook QRH(62)
