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OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT MANAGEMENT
CONTROLS AND INDICATORS - MCDU - PAGE DESCRIPTION
A330/A340 FLEET DSC-22_20-50-10-25 P 41/124
FCOM 19 AUG 10
[ 2L ] CLB/DES SPD
LIM (magenta)
This field displays the speed limit applicable to the climb or descent phase.
It displays it in a large font when data has been inserted manually and in a
small font when data comes from the database.
[ 3L ] SPD CSTR
(magenta)
This field displays any speed constraint assigned to the revised waypoint. It
is in a large font when inserted manually, and in a small font when it comes
from the database.
It is not displayed at the origin airport, a FROM waypoint, a speed limit
pseudo waypoint, or the destination airport.
[ 4L ] QNH This field functions only when the revised waypoint is the primary
destination.
It allows the pilot to enter the sea-level atmospheric pressure.
This field is identical to the QNH field of the PERF APPR page.
[4L] MACH/START
WPT (blue)
This prompt allows the pilot to enter or modify the start point of a constant
Mach segment, and its associated Mach. This prompt is not displayed
at primary destination and alternate flight plan waypoints. (Refer to
STLO-22_20_R-30-20-05 VERTICAL REVISION)
[ 5L ] WIND (blue) The pilot presses this key to access to the wind pages. The first wind page
that is displayed, corresponds to the selected waypoint e.g. climb page if the
selected waypoint is a climb phase waypoint.
A CLR action reverts it to brackets.
[ 6L ] RETURN or CLB The pilot presses this key to return to the last displayed flight plan page.
When displayed pressing this key assigns the constraint to CLB phase and
inserts it into the vertical flight plan. The page reverts to the flight plan page.
[2R] RTA prompt This prompt gives access to the RTA page. It is not displayed when the
VERT REV page is accessed from the alternate F-PLN.
[ 3R ] ALT CSTR
(magenta)
This field displays the altitude constraint assigned to this revised waypoint.
It uses a large font when the constraint is entered manually, a small font
when it is from the database.
A CLR action reverts it to brackets.
The constraint may be :
• “At”, entered as XXXXX (FL 180, for example)
• “At or above”, entered as + XXXXX or XXXXX + (+ FL 310, for example)
• “At or below”, entered as – XXXXX or XXXXX – (– 5000, for example)
• A “window” constraint.
The altitude window consists of two altitudes between which the aircraft
should fly. The crew cannot manually enter a “window” constraint.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT MANAGEMENT
CONTROLS AND INDICATORS - MCDU - PAGE DESCRIPTION
A330/A340 FLEET DSC-22_20-50-10-25 P 42/124
FCOM 19 AUG 10
G/S INTCP (green)
[ 4R ] ALT ERROR
(green)
This field displays the glide intercept altitude for an ILS approach on the
vertical revision page at destination.
When the aircraft misses a predicted altitude constraint, this field displays
the difference between the altitude constraint and the predicted altitude.
If, for example, “– 500” appears in this field in green, the aircraft will reach
the waypoint at an altitude 500 ft below the constraint altitude.
This applies only to waypoints in the climb and descent phases.
[4R] END WPT (blue) This prompt allows the pilot to enter or modify the endpoint of a constant
Mach segment. It is displayed when a pair Mach/start exists in 4L field.
This prompt is not displayed on the destination VERT REV page. (Refer to
STLO-22_20_R-30-20-05 VERTICAL REVISION).
[ 5R ] STEP ALTS
(white)
This legend appears for any waypoint once a cruise altitude has been
entered. It is not available in engine-out, descent, approach and go-around
phases.
This gives the pilot access to the step altitudes page.
[ 6R ] DES When this field displays “DES”, pressing this key assigns the constraints to
the descent phase and inserts them into the vertical flight plan. The page
reverts to the F-PLN page. (See Note, below).
Note: Altitude and speed constraints may apply to climb, descent or approach phase, but never to
cruise phase. Fields 6L/6R display “CLB/DES” when the revised waypoint is a cruise phase
waypoint and the FMGS needs to know if the new constraint is to be applied in climb or
descent phase. The FMGS will modify the cruise phase accordingly. These 2 prompts also
display “CLB/DES” when the predictions are not computed. (top of climb and top of descent
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A330/A340机组操作手册 FLIGHT CREW OPERATING MANUAL FCOM 1(144)
