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change the value through this field.
[ 2L ] TRIP/TIME
(green)
This field displays trip fuel and time when predictions become available.
The pilot cannot modify this data.
[ 3L ] RTE RSV/%
(blue)
This field displays the reserve fuel for the route and the corresponding percentage of
trip fuel. It may be blank, if such is the policy of the operator. The pilot can either enter a
route reserve, or a percentage, and the system then automatically computes the nominal
value.
[ 4L ] ALTN/TIME
(green)
This field displays alternate trip fuel and time, assuming that the Cost Index = 0 and that
the aircraft flies at the default cruise flight level. This field displays its information in small
font, and it cannot be modified by the flight crew.
[ 5L ] FINAL/TIME
(blue)
This field displays hold fuel and time, associated with continued flight to the alternate
airport (or destination airport if no alternate is defined). The pilot may enter a final fuel
or time (at alternate or destination) and the system will compute associated holding
fuel/time available. Assumptions include a racetrack pattern 1 500 ft above the alternate
airport, with the aircraft in CONF 1 at maximum endurance speed (or in accordance with
the airline fuel policy established in the database).
[ 6L ] EXTRA/TIME
(green)
This field displays the amount of extra fuel and the available time it represents for holding
over the alternate or primary destination, if the pilot did not define an alternate.
EXTRA FUEL = BLOCK - (TAXI + TRIP + RSV + ALTN + FINAL)
The field displays this information in small font, and it cannot be modified by the flight
crew.
To be continued on next page
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT MANAGEMENT
CONTROLS AND INDICATORS - MCDU - PAGE DESCRIPTION
A318/A319/A320/A321 FLEET DSC-22_20-50-10-25 P 13/104
FCOM 19 AUG 10
Continued from previous page
[ 1R ] ZFWCG/ZFWThe 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 page title 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 automatically restarts and
FUEL PLANNING is displayed in green.
Note: If the pilot enters a number in the 1R or 2R field 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).
[ 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 small blue font.
An entry preceeded by –, H, HD is considered as headwind, +, T, TL as tailwind. The
entered velocity is displayed in large blue 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 and alternate, as well as fuel management data after the engines are started.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT MANAGEMENT
CONTROLS AND INDICATORS - MCDU - PAGE DESCRIPTION
A318/A319/A320/A321 FLEET DSC-22_20-50-10-25 P 14/104
FCOM 19 AUG 10
Line 1
AT-UTC/TIME-EFOB
These fields display time and fuel predictions to the primary destination. TIME is
displayed before takeoff. UTC predictions are displayed after takeoff. After the pilot
enters an Estimated Takeoff Time (ETT), the UTC is displayed.
　
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