OPERATOR’S MANUAL
CMA-9000 FLIGHT MANAGEMENT SYSTEM
OPERATION WITH FAILED TAS INPUT
When operating in a position-fixing navigation mode (e.g. GPS, DME/DME, DME/VOR), long term navigational
accuracy is not degraded due to loss of the TAS input. However, short term accuracy may be degraded during
periods of rapidly changing ground speed and the computation and display of wind will not be available.
OPERATION WITH A FAILED ALTITUDE INPUT
When the FMS is operated with the external Thales MMR GPS receiver, the system installation is approved for
en-route and terminal operations without altitude aiding, and for GPS instrument approaches with only an input
of pressure altitude rather than baro-corrected altitude. See the AFMS/RFMS for further details.
If the FMS is configured for VNAV, baro-corrected altitude must be available for the FMS to calculate its Vertical
Deviation. Baro-corrected altitude can be read directly from an Air Data Computer.
Once in flight, the actual satellite constellation determines whether altitude aiding is required to achieve the level
of integrity to conduct a GPS instrument approach. With a good satellite constellation, no altitude aiding may, in
fact, be necessary. Therefore the loss of the altitude input to the FMS may have no impact on the operation of
the flight, with the exception that manual waypoint sequencing will be required for altitude-terminated legs. This
can be achieved via the <NEXT LEG> prompt (LSK 6R) on RTE x LEGSs and PROGRESS pages.
When all altitude inputs are lost, including GPS, manual update of aircraft altitude may be made on PROGRESS
4/4 page.
Page 17-3
August 17, 2010
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