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AT-UTC/TIME-EFOB
These fields display time and fuel predictions to the alternate airport. (Refer to
DSC-22_20-30-10-15-C ALTERNATE FUNCTION - GENERAL).
[ 3L ] GW/CG 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 path.
If no center of gravity 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 pilot can modify both the GWand the CG.
[ 4L ] RTE RSV/% Prior to departure, this field displays the route reserve fuel and the corresponding
percentage of trip fuel. After takeoff, it displays the percentage of the remaining trip
fuel from the present position to the destination. The field may be blank, depending
on the fuel policy of the operating airline. The crew can enter either a RTE RSV or a
RTE RSV %. The system automatically computes the other value.
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 15/104
FCOM 19 AUG 10
[ 5L ] FINAL/TIME This field displays the amount of fuel available for holding, and the amount of hold
time that will be available over the alternate airport (or primary destination, if no
alternate is defined). The pilot may enter either a final fuel, or a time, although the
system automatically computes a nominal value. The system assumes that the
holding will be in a racetrack pattern, 1 500 ft above the alternate airport, with the
aircraft in clean configuration at green dot speed (or will obey the “airline fuel policy”
of the database).
[ 6L ] EXTRA/TIME This field displays the amount of extra fuel, and the resulting time available for
holding over the primary destination.
EXTRA FUEL = BLOCK - (TAXI + TRIP + RSV + ALTN + FINAL).
The pilot cannot modify this field (displayed in small green font).
[ 3R ] FOB This field displays the fuel on board, which is computed :
With information from the fuel flow and fuel quantity ‐ sensor (FF + FQ), or
‐ From FF only (enter/FF to deselect FQ), or
‐ From FQ only (enter/FQ to deselect FF).
The pilot can modify this number.
[ 4R ] CRZ TEMP/TROPO This field displays the temperature at the cruise flight level and the altitude of the
tropopause.
The pilot can modify both values.
This field is dashed, when the aircraft sequences the top of climb.
Note: All fields, except [ 4R ], show dashes until the pilot starts an engine.
FLIGHT PLAN PAGES
Applicable to:
These pages display all waypoints of the active and alternate flight plans, along with associated
predictions.
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 16/104
FCOM 19 AUG 10
The pilot can make all revisions to the lateral and vertical flight plans from these pages:
He presses the left key to revise the lateral flight plan, and the right key to revise the vertical flight
plan.
He presses the F-PLN key on the MCDU console to access the page A of the active flight plan.
FLIGHT PLAN A PAGE
Page A displays time, speed, and altitude predictions for each waypoint of the active flight plan.
TITLE FLIGHT NUMBER (blank, if no flight number has been entered).
This line may display : TMPY in yellow if a temporary flight plan exists ; OFST in
white, if a lateral offset is flown ; or, OFST in yellow, if a lateral offset revision is
pending.
Line 1 to Line 5
WPT, UTC, SPD, ALT
These lines display consecutive waypoints alongwith associated predictions of
time, speed or Mach and altitude for each.
TIME is displayed before takeoff, and UTC after takeoff. After the pilot enters an
estimated takeoff time (ETT), UTC is displayed.
The time and flight level display at the FROM waypoint (first line of the flight
plan) are values that the system memorized at waypoint sequencing.
[ 1R ] SPD/ALT The field dedicated to SPEED or MACH is blank at the FROM waypoint, except
at the departure airport. (V1 associated with runway elevation, is displayed).
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