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when it is.
[ 1L ] ACT MODE This field shows the active speed/Mach target : SELECTED or MANAGED
(ECON).
The pilot cannot modify it through this field.
[ 2L ] CI This field shows the cost index as initialized on the init A page or defaulted
from the database, or as inserted in this field by the crew.
EO LRC replaces automatically the cost index value in case of engine out.
[ 3L ] MANAGED When the speed target is managed, the FMGS computes the ECON speed.
This field displays the ECON speed/Mach :
ECON is the optimum speed or Mach, in terms of time and fuel cost ratio,
related to the active flight plan, weather, cruise flight level, and gross weight.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT MANAGEMENT
CONTROLS AND INDICATORS - MCDU - PAGE DESCRIPTION
A330/A340 FLEET DSC-22_20-50-10-20 P 90/116
FCOM 19 AUG 10
[ 4L ] PRESEL or SELECTED
If cruise phase is not active :
the pilot can enter a preselected speed or Mach number.
If cruise phase is active :
This field is blank.
Note: When the cruise phase is not yet active, a * symbol appears next to the selectable speed
(or Mach).
[ 6L ] PREV PHASE or The pilot can press this key to call up the climb page, if the cruise phase is
not yet active.
[ 6L ] ACTIVATE APPR
PHASE
This field displays this legend if the cruise phase is active. The flight crew
presses the key once to change the legend to “CONFIRM APPR PHASE*”.
A second press activates the approach phase.
Note: If the pilot inadvertently activates the approach phase, 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 automatically displays 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
FLXX, or TO T/D
This 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 then recomputes 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). As DES CAB RATE
is a negative value, “minus” is not a necessary entry.
[ 5R ] STEP ALTS This key calls up the STEP ALTS page (see vertical revision).
[ 6R ] NEXT PHASE This key calls up the DES page.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT MANAGEMENT
CONTROLS AND INDICATORS - MCDU - PAGE DESCRIPTION
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FCOM 19 AUG 10
PERF DESCENT PAGE
Applicable to:
TITLE DES in a white large font when the descent phase is not active and in a
green large font, when it is active.
[ 1L ] ACT MODE This field displays the active speed target (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.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT MANAGEMENT
CONTROLS AND INDICATORS - MCDU - PAGE DESCRIPTION
A330/A340 FLEET DSC-22_20-50-10-20 P 92/116
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A330/A340机组操作手册 FLIGHT CREW OPERATING MANUAL FCOM 1(124)
