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key once to change the legend to “CONFIRM APPR PHASE*”.
A second press activates the approach phase.
Note: If the pilot activates the approach phase inadvertently, it can reselect the
cruise flight level into the progress page to reactivate the cruise phase.
[ 1R ] TIME/UTC
DES 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 ] STEP TO FL XX,
DRIFT DOWN TO FL XX,
or TO T/D
The field, in combination with 3R, displays the predictions for the step point and the
step altitude, the drift down altitude, or the Top of Descent.
[ 3R ] TIME/UTC and DIST This field displays the time and distance to go to the various points identified in 2R.
[ 4R ] DES CABIN RATE This field displays Max [computed DES cabin rate, maximum descent cabin rate].
The pilot may modify the value : the FM recomputes then the top of descent in order
to match this value. If the FM cannot match the pilot entry, the FM computed value
overwrites the pilot entry.
A clear action reverts to the default value (- 350 ft/min). DES CAB RATE being a
negative value, 'minus” is not a necessary entry.
[ 5R] STEP ALTS This key calls up the STEP ALTS page (vertical revision Refer to DSC-22_20-50-10-25
VERTICAL REVISION PAGES).
[ 6R ] NEXT PHASE This key calls up the DES 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 85/104
FCOM 19 AUG 10
PERF DESCENT PAGE
Applicable to:
TITLE DES is in large white font if the descent phase is not active ; it is in large green font, if
it is.
[ 1L ] ACT MODE This field displays the preselected or active speed mode (MANAGED or SELECTED).
The flight crew cannot modify it through this field.
[ 2L ] CI This field displays the cost index, as initialized on the INIT A page or defaulted from
the database, or inserted in this field by the flight crew. The flight crew cannot modify
it when the descent phase is active.
[ 3L ] MANAGED �� If the descent phase is not active :
Before the flight crew makes any entry. This field displays MANAGED in white,
with the associated ECON descent Mach or speed in blue. The crew may
overwrite the ECON descent Mach or speed by entering a Mach number or
a speed in this field. The system uses the pilot entry to compute the descent
profile. The descent may be flown in managed using this new pilot entry.
The entry is modifiable. It can be cleared to revert to ECON speed/Mach.
�� If the descent phase is active :
The flight crew cannot make an entry in this field.
The field displays the ECON speed/Mach or the speed/Mach value previously
entered by the pilot.
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 86/104
FCOM 19 AUG 10
Continued from previous page
[ 4L ] blank or
SELECTED
�� If the descent phase is not active, or the descent phase is active but the
active speed mode is MANAGED :
This field is blank.
�� If the descent phase is active and the active speed mode is SELECTED :
The field displays the speed or Mach target manually selected by the pilot.
“SELECTED” is displayed in the [ 1L ] field.
To modify the field value, the pilot will use the SPD/MACH selector knob of the
FCU. [ 4L ] field and FCU window will display the same value.
Pushing in the FCU speed selector knob activates the managed SPD/MACH
target displayed in the [ 3L ] field.
[ 5L ] Blank or
EXPEDITE
If the descent phase is not active this field is blank.
Displays this legend if the descent phase is active.
It indicates the time and distance required to reach the altitude displayed in the 2R
field at MMO/VMO speed. The pilot cannot select the EXPEDITE mode through this
field.
[ 6L ] PREV PHASE
or
ACTIVATE APPR PHASE
This key calls up the cruise phase page if the descent phase is not yet active.
Displayed if the descent phase is active. First press causes “CONFIRM APPR
PHASE” to be displayed. Second press activates the approach phase.
[ 1R ] TIME/UTC
　
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