OPERATOR’S MANUAL
CMA-9000 FLIGHT MANAGEMENT SYSTEM
1.8.9 Planned Level-Off in Descent
If the descent path contains level segments (e.g. de
the FMS will capture and hold the level segment of the descent trajectory.
termined by waypoints with the same altitude constraints)
emains VNAV.
ical speed for the
ershoot the next descent altitude constraint by more than 150 ft:
ssage is raised
• achievable altitude constraint is displayed in amber on the DES page, the PROFILE page and on the
e and on the PROFILE
n configuration.
The crossing altitude displayed at 3R is not the same as the one on the Profile page when the UNABLE
d on current aircraft conditions, that the aircraft will undershoot the next descent
altitude constraint by more than 150 ft:
manded if required prior to
sequencing the holding fix for the first time.
On a performance path, the FMS commands speed on thrust before leveling off at the hold fix crossing altitude.
Upon commanding a hold exit, the holding pattern speed is maintained until the re-capturing the performance
path. An acceleration is initiated if the descent target speed is greater than the holding target speed. If a
deceleration from the holding speed to the descent speed is required, the FMS commands this once the holding
fix has been sequenced. Speed on pitch resumes when the vertical speed corresponds to the performance path.
The VDEV is displayed relative to the current holding fix crossing altitude while the hold is in progress.
In this case, the engaged mode of the autopilot r
1.8.10 Unachievable Waypoint Altitudes in Descent
If the FMS predicts, based on current ETE, Distance to Go and the maximum achievable vert
current conditions, that the aircraft will ov
• An UNABLE ALT CONSTRAINT me
The un
LEGS page
• A predicted waypoint crossing altitude is displayed in white at [3R] on the DES pag
page with the associated waypoint.
NOTES:
The message is inhibited if the aircraft is not in clea
ALT CONSTRAINT message is raised.
1.8.11 Protection of Altitude Constraints in Descent
If the FMS predicts, base
• The FMS commands a level off at the altitude constraint
• The FMS resumes normal descent once the constrained waypoint has been sequenced
1.8.12 Holding in Descent
During descent, if a holding pattern is part of the flight plan, a deceleration will be com
Page F-44
August 17, 2010
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