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the selected revised waypoint.
The pilot may make several different vertical revisions (although some may not be available at all
waypoints) : Speed limit, speed constraint, altitude constraint, time constraint, wind page and STEP
ALTS 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 36/104
FCOM 19 AUG 10
TITLE
(white)
“VERT REV AT [location]”
The second line shows remaining fuel and extra fuel at the waypoint
being revised.
[ 1L ] “TOO STEEP PATH BEYOND”
(amber)
This message is displayed, if the waypoint is part of a leg with too
steep a descent path.
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
[ 2L ] CLB/DES SPD LIM
(magenta)
This field displays the speed limit applicable to the climb or descent
phase. It displays it in large font when data has been inserted
manually, and in 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 large font when inserted manually, and in small font
when it comes from the database.
It is not displayed at the origin airport, at a FROM waypoint, a speed
limit pseudo waypoint, or the destination airport.
[ 4L ] QNH This field only functions when the revised waypoint is the primary
destination.
It allows the pilot to enter the atmospheric pressure at sea level.
This field is identical to the QHN 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. It is not displayed
at primary destination and alternate flight plan waypoints. (Refer
to DSC-22_20-30-20-25-C ENTERING A CONSTANT MACH
SEGMENT).
[ 5L ] WIND
(blue)
The pilot presses this key to access the wind pages.
The first wind displayed page, 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 large font when the constraint is manually-entered, and small
font when it is from the database.
A CLR action reverts it to brackets.
The constraint may be :
• “At”, entered as XXXXX (Example : FL 180).
• “At or above”, entered as + XXXXX or XXXXX + (Example :
FL + 310).
• “At or below”, entered as – XXXXX or XXXXX – (Example :
-5 000).
• A “window” constraint.
The altitude window consists of two altitudes between which the
aircraft should fly. The crew cannot manually enter a “window”
constraint.
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
G/S INTCP
(green)
This field displays the glide intercept altitude for an ILS approach on
the vertical revision page at destination.
[ 4R ] ALT ERROR
(green)
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 only applies 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
　
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