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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 automatically displays the predicted arrival time
(UTC).
After takeoff, it displays the predicted arrival time at destination (UTC)
and the remaining fuel on board (DEST EFOB) at destination, in
green font. 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 FCU-selected altitude. The flight crew can
modify it to any altitude lower than the 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_20-50-10-28 P 96/126
FCOM 19 AUG 10
Applicable to:
,
,
MSN,,
4538,,
PERF APPR
TITLE APPR is in large green font, if the approach phase is active, and in
large white font, if it is inactive.
[ 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 crew 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 :
• "1003", as 1 003 hPa ;
• "29.92", as 29.92 in.
The crew can modify this entry at any time.
The system uses the QNH value to compute the cabin
repressurization segment, and the optimum descent profile.
[ 2L ] TEMP This field displays the temperature at destination. It displays brackets
until the crew enters the temperature. The crew can modify this
figure.
The system uses this temperature to refine its computation of the
descent profile (ISA model).
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_20-50-10-28 P 97/126
FCOM 19 AUG 10
[ 3L ] MAG WIND or TRUE
WIND
In this field, the flight crew enters the magnetic wind at the destination
in knots. 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 FL Displays the Transition Level, computed by the FMS based on the
Transition Altitude (extracted from the database) and the QNH value
entered in the [1L] field. It is rounded to the upper multiple of 5. By
default, it is displayed in small blue font. The crew can modify it (it is
then displayed in large blue font).
[ 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 inactive.
Pressing this key calls up the descent performance page.
[ 1R ] FINAL Displays the approach specified in the flight plan.
The flight crew cannot modify it from this field.
[ 2R ] MDA/MDH 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, that they can modify at any time.
If the flight crew makes an entry in the [ 3R ] field, 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 the field reverts to
brackets. The DH range is from 0 to 700 ft.
[ 4R ] LDG CONF CONF 3 The flight crew can select configuration 3 by pressing the 4R key.
This moves the asterisk down to the [ 5R ] field, that displays “FULL”.
[ 5R ] FULL The flight crew can use this key to select configuration FULL when
necessary configuration FULL is the default landing configuration.
　
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