OPERATOR’S MANUAL
CMA-9000 FLIGHT MANAGEMENT SYSTEM
SECTION 17
ABNORMAL PROCEDURES
POWER INTERRUPTIONS
A short FMS power interruption, lasting less than 7 seconds in the air or less than 90 seconds on the ground
(depending on the configuration), will have no impact on the active flight plan of the FMS. The FMS will recover
and redisplay the active FMS page (except for duplicate waypoint pages, where the previously displayed page
will be recovered). Verify position and update if necessary. Verify that the deselected sensors remained
deselected and correct if necessary. Navigation and guidance will continue to operate normally. Re-select the
desired flight instrument display and AP/FD modes. It is recommended that the flight crew review the content of
the flight plan specially considering the modifications made within 5 seconds prior to the power outage.
NOTE: A momentary power interruption (less than 200 milliseconds) will not cause the GPS sensor to transition
to acquisition mode.
A power interruption lasting longer than 7 seconds while the aircraft is airborne will require pilot action to
re-select the active FMS page and:
1. Enter a valid TO waypoint on the RTE x LEGS 1/X page.
2. Verify position and flight plan, update (if necessary).
3. Re-select the desired flight instrument display and AP/FD modes.
A power interruption lasting longer than 7 or 90 seconds (depending on the configuration selection) when the
aircraft is on the ground will result in the loss of the flight plan. Re-enter the origin and destination airports and
the flight plan.
HIGH TEMPERATURE OPERATIONS
A protection mechanism has been implemented to protect the lamp life duration (Refer to CMA-9000 Installation
Manual section VI Servicing). This mechanism dims the display when the temperature reaches an
environmental temperature higher than approximately +70C. The FMS has been qualified to maintain full
brightness for a minimum of 30 minutes. It is therefore recommended to manually decrease the display dimming
(using the BRT key or the external display control unit) to the minimum acceptable dimming setting if and only if
the FMS is to be operated in DAY luminance mode for longer than 30 minutes. No degraded operation is
foreseen in normal operation mode below +70 C.
Page 17-1
August 17, 2010
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