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DEST EFOB
Before takeoff, this field displays the flight time to destination and the predicted
remaining fuel on board. If the crew enters an estimated takeoff time, the field
displays automatically the predicted arrival time (UTC) at destination.
After takeoff, it displays the predicted arrival time at destination (UTC) and the
remaining fuel on board. EO CLR is displayed when an engine-out is detected.
[ 2R ] PRED TO... This field displays the target altitude for the predictions in [ 3R ] [ 4R ], or [ 5R ].
The display defaults to the altitude selected on the FCU. The flight crew can modify it
to any altitude lower than present altitude.
[ 3R ]
[ 4R ]
[ 5R ]
These fields display time and distance predictions down to the target altitude selected
in [ 2R ], computed for the current vertical mode (DES or OP DES, EXPEDITE) and
the indicated speed mode (MANAGED, SELECTED, or EXPEDITE).
[ 6R ] NEXT PHASE The pilot presses this key to call up the PERF APPR 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 87/104
FCOM 19 AUG 10
PERF APPR PAGE
Applicable to:
TITLE APPR is in large white font, if the approach phase is not active ; it is in large green font, if it
is.
[ 1L ] QNH This field displays brackets, when the aircraft is more than 180 nm from the destination.
Inside 180 nm, a mandatory amber box appears. The pilot must enter the QNH, either in
hPa (three or four digits), or in inches of mercury (two digits, decimal point, and two more
digits).
The system interprets :
• 1 003 as 1 003 hPa;
• 29.92 as 29.92 in.
The pilot can modify this entry at any time.
The system uses the QNH to compute the cabin repressurization segment.
[ 2L ] TEMP This field displays the temperature at destination. The field displays brackets until the pilot
enters the temperature. The pilot can modify this figure.
The system uses this temperature to refine its computation of the descent profile (ISA
model).
[ 3L ] MAG WIND The flight crew enters the magnetic wind in knots at the destination in this field. The system
transmits any entry made in this field to the vertical revision and flight plan B pages (which
display wind direction as true, not magnetic).
[ 4L ] TRANS ALT This field displays the transition altitude taken from the data base (small font) or entered by
the flight crew (large font).
The flight crew can modify it at any time.
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
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FCOM 19 AUG 10
Continued from previous page
[ 5L ] VAPP The FMGC computes this approach speed, using the formula :
VAPP = VLS + 1/3 of the headwind components (limited to VLS + 5 as a minimum and VLS
+ 15 as a maximum).
The flight crew can modify VAPP. A clear action reverts VAPP to the computed value.
Note: VLS = 1.23 VS1G of the selected landing configuration (full or 3).
[ 6L ] PREV PAGE This field displays this legend if the approach phase is not active.
Pressing this key calls up the descent performance page.
[ 1R ] FINAL This field displays the approach specified in the flight plan.
The flight crew cannot modify it through this field.
[ 2R ] MDA/MDH This field displays the minimum descent altitude (or minimum descent height if the QFE pin
program is activated), with associated brackets. The flight crew inserts the value, which it
can modify at any time.
If the flight crew makes an entry in [ 3R ] or changes the approach, it clears this figure.
[ 3R ] DH If the flight plan includes an ILS approach, this field displays “DH” and empty brackets. The
flight crew inserts the decision height. The system will accept an entry of “NO”. If the flight
crew inserts an MDA or an MDH, this erases the decision height, and this field reverts to
brackets. The DH range is 0 to 700 ft.
[ 4R ] LDG CONF
CONF 3
The flight crew can select configuration 3 by pressing the 4R key.
This moves the * down to the [ 5R ] field, which is displaying “FULL”.
[ 5R ] FULL The flight crew can use this key to select configuration FULL when necessary configuration
FULL is the default landing configuration.
[ 6R ] NEXT PHASE Pressing this key calls up the go-around performance page.
PERF GO AROUND PAGE
Applicable to:
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
　
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