OPERATOR’S MANUAL
CMA-9000 FLIGHT MANAGEMENT SYSTEM
SYSTEM ALERT
MESSAGE
DESCRIPTION
ACTION
UNABLE ALT
CONSTRAINT
In climb, if the active waypoint has an
altitude constraint above the current
altitude and the FMS computes for 30
seconds that, at the current ground
speed and altitude rate, the aircraft
cannot reach an altitude within 150 ft of
the next altitude constraint.
In descent, if the aircraft is in clean
configuration, and above the descent
path by more than 150 feet, and the
FMS computes for 10 seconds that the
aircraft cannot reach an altitude within
150 ft of the next altitude constraint.
NOTE: In descent, the message will be
cleared if the aircraft configuration
changes to not clean or the FMS
computes for 10 seconds that the
aircraft will be at or below the next
altitude constraint or VDEV is less than
150 feet.
Review the flight plan (waypoint altitude
constraint).
Take appropriate action to fly at the waypoint
altitude constraint.
UNABLE TEMP COMP
ALT
Upon entry of the destination airport
temperature, the FMS computes at
least one temperature-compensated
altitude that is higher than the lowest
non-temperature compensated altitude.
Review the destination airport OAT data entry
in the DES Forecast 1/2 page. Verify the
temperature units and sign (+/-).
If the destination airport OAT data entry is
correct and the error message still shows-up,
inform ATC that you will not be able to comply
with the identified waypoint altitude constraint
compensated for cold temperature.
VAPP DISAGREE
While operating multiple FMS in
synchronized mode, once the active
flight plan transfer is complete, upon
detection of a 2 knot or greater
difference between the on-side and off-
side Final Approach Speed for at least
5 seconds.
Check that Final Approach Speed on all FMS
are consistent.
When in VNAV Approach mode, manage the
Final Approach Speed manually..
.
VERIFY RNP VALUE
A manually entered RNP value greater
than that approved for the phase of flight
is used.
The crew is responsible for monitoring
navigation performance and ensuring that the
aircraft remains within protected airspace at all
times.
Verify that the RNP value is appropriate for the
phase of flight. Modify as necessary.
VHF CONTROL LOST
VHF1 CONTROL LOST
VHF2 CONTROL LOST
The FMS cannot tune the VHF COM
radio
Control COM radio from another source.
Advise maintenance.
VOR CONTROL LOST
VOR1 CONTROL LOST
VOR2 CONTROL LOST
The FMS cannot tune the VOR/ILS
radio
Control NAV radio from another source.
Advise maintenance.
.
VNAV DATABASE
INVALID
The FMS detects that the Performance
Database CRC is invalid.
NOTE: The FMS invalidates VNAV
Performance function (no vertical
profile, no fuel and crossing altitudes
predictions).
Do not use the FMS for VNAV.
Advise Maintenance.
Page E-11
August 17, 2010
To Next Page
Loading...