OPERATOR’S MANUAL
CMA-9000 FLIGHT MANAGEMENT SYSTEM
SYSTEM ALERT
MESSAGE
DESCRIPTION
ACTION
FMS FAILED
Internal FMS hardware fault.
Master Caution is active.
Do not use the FMS for radio tuning or
navigation. Refer to MAINT MESSAGE page for
more details.
Advise maintenance crew.
FMS- FMS POS
DISAGREE
The FMS reports discrepancy between
the onside position (derived from its
best onside sensor) and the cross-side
position(s) that has exceeding a
threshold for more than 10 seconds.
When occurring during an approach, initiate a
missed approach.
Whenever possible, compare the FMS
Position with the position obtained from
available sensors.
Compare Position on onside and cross-side(s)
to determine the most probable one to identify
the incorrect sensor and disable the sensor
when required.
Select Independent Mode and ensure that the
A/P in command is being driven by the FMS
with the most probable position.
Synchronized Mode can be re-established
when the message disappears from each FMS
“MESSAGE RECALL” page.
Report problem to maintenance
FUEL INPUT LOST
Total loss of Fuel Computer data on the
onside and offside FMSs.
Manually enter fuel quantity and fuel flow on
FUEL 1/1 page.
Note: Manual entry is not possible when VNAV
is configured.
Fuel Quantity can be entered from PERF INIT
page when PERF VNAV configured.
Verify if Fuel Computer(s) operate(s) normally.
Advise maintenance.
GLONASS INPUT LOST
Failure of all GLONASS sensor inputs
GLONASS is not longer operational.
GPS NAV LOST
The GPS sensor is not being used for
the active navigation.
Maintain the flight path within the range of
NAVAIDS.
GPS POS UNCERTAIN
No IFR approved navigation sensor
(including GPS) meets requirements for
the phase of flight.
The FMS is using GPS position data for
which the GPS integrity does not meet
requirements for the phase of flight.
This message does not imply that the
GPS position is in error, only that
confidence in the position accuracy is
reduced.
GPS integrity is lost.
GPS POS UNCERTAIN is mutually
exclusive with GPS NAV LOST.
GPS approaches cannot be flown.
Verify GPS position and monitor Horizontal
Integrity Limit (HIL).
Revert to an alternate navigation means if GPS
position becomes unreliable.
GROSS WEIGHT
DISAGREE
When the actual aircraft gross weight
(ZFW + Fuel weight decoded from the
fuel computer) computed for the on-side
FMS is different from the actual aircraft
gross weight computed by the off-side
FMS(s) by a PDB-defined threshold for
at least 60 consecutive seconds when
operating in synchronized mode.
Verify that the ZFW and Fuel weights displayed
on all FMS are consistent and update them if
required.
If all is consistent and the condition persists, do
not use the FMS for VNAV.
Page E-6
August 17, 2010
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