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displays information in small font, and the flight crew cannot modify it.
[ 5L ] FINAL/TIME This field displays the hold fuel and time, associated with continued flight
to the alternate airport (or destination airport, if selected in the “airline fuel
policy” section of the database). The pilot may enter a final fuel or time, and
the system will compute associated holding time/fuel available.
The system assumes that the holding will be in a racetrack pattern,1 500 ft
above the alternate airport, for 30 min , with the aircraft in CONF1 at
maximum endurance speed (racetrack pattern, altitude and selected airport
can be modified through the “airline fuel policy” section of the database).
[ 6L ] EXTRA/TIME
(green)
This field displays the amount of extra fuel, and the available time it
represents for holding over to the alternate or primary destination, if the pilot
did not define an alternate.
EXTRA FUEL = BLOCK – (TAXI + TRIP + RSV + ALTN + FINAL).
The field displays information in small font, and the flight crew cannot modify
it.
[ 1R ] ZFWCG/ZFW The zero fuel weight and the location of the zero fuel weight CG are
mandatory entries that allow the system to compute speed management and
predictions. The pilot can modify this data.
[ 2R ] BLOCK The block fuel in this field is a mandatory entry that allows the system to
predict the Estimated Fuel on Board (EFOB). When the pilot enters a block
fuel, the title of the page changes to INIT FUEL PREDICTION.
The FMGC may also compute the block, if the pilot selects the FUEL
PLANNING function.
[ 3R ] FUEL PLANNING
(amber)
Pressing this key initiates an FMGC block fuel computation. When the pilot
selects this function, FUEL PLANNING becomes green, and the BLOCK
field is dashed during FMGC computation. The title of the page changes
to INIT FUEL PLANNING, and BLOCK CONFIRM* replaces the FUEL
PLANNING prompt, when the block fuel is computed by the FMGC. If the
pilot modifies the parameters used for the prediction computation before
confirmation, the computation restarts automatically and FUEL PLANNING
is displayed in green.
Note: If the pilot enters a number in field 1R or 2R that exceeds the limits, the field displays
“ENTRY OUT OF RANGE” and does not accept the value.
[ 4R ] TOW (green) This field displays the computed takeoff weight.
The pilot cannot modify it (small font).
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT MANAGEMENT
CONTROLS AND INDICATORS - MCDU - PAGE DESCRIPTION
A330/A340 FLEET DSC-22_20-50-10-25 P 15/124
FCOM 19 AUG 10
[ 5R ] LW (green) This field displays the computed landing weight at the primary destination.
The pilot cannot modify it (small font).
[ 6R ] TRIP WIND This field allows the entry of a mean wind component for the trip from
the primary origin to the primary destination. Upon entry of a CO RTE or
FROM/TO pair, this field defaults to HD 000 in blue small font.
An entry preceeded by –, H, HD is considered as headwind, +, T, TL as
tailwind. The entered velocity is displayed in blue large font.
As soon as the crew inserts a wind on the CLIMB, CRUISE or DESCENT
WIND page, the SYSTEM no longer considers the trip wind.
FUEL PREDICTION PAGE
Applicable to: ,
The pilot presses the FUEL PRED key on the MCDU console to display fuel prediction information
at destination (DEST) and alternate (ALTN), as well as fuel management data after the engines are
started. The pilot may also select a final Gross Weight value for jettison operation.
Line 1
AT-UTC/TIME-EFOB
These fields display predictions of time and fuel to the primary destination.
TIME is displayed before takeoff, UTC predictions after takeoff. After the
pilot enters an Estimated Takeoff Time (ETT), the UTC is displayed.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT MANAGEMENT
CONTROLS AND INDICATORS - MCDU - PAGE DESCRIPTION
A330/A340 FLEET DSC-22_20-50-10-25 P 16/124
FCOM 19 AUG 10
Line 2
AT-UTC/TIME-EFOB
[ 3L ] GW/CG
These fields display predictions of time and fuel to the alternate airport.
(Refer to DSC-22_20-30-10-10-F ALTERNATE FUNCTION - GENERAL) for
details.
GW
The system continually updates gross weight during the flight. If no zero fuel
weight has been entered, the screen displays amber boxes next to this key.
The pilot must enter information in these boxes in order to obtain a speed
profile, speed computations, and predictions. The field displays dashes, as
long as the system is not calculating fuel on board.
CG
The system continually updates the center of gravity location along the flight
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A330/A340机组操作手册 FLIGHT CREW OPERATING MANUAL FCOM 1(136)
