Abnormal Procedures 5-13
BUILT-IN TEST (BIT) FAILURE
Failure Indication:
If the DFC-PFD system recognizes that the autopilot is invalid
due to failing an internal self-test, a yellow āAUTOPILOT INOP
SELF TEST FAILā message is displayed along middle of the PFD
annunciator strip.
Functionality Lost:
All autopilot functionality will be lost for the duration of this
message display. It is most likely experienced during initial power
on of the autopilot during ground operations and therefore, would
not allow autopilot engagement.
Recommended Pilot Action:
If on the ground and the fault does not clear itself within 15
seconds, consider cycling power to the autopilot either via the
circuit breaker or the avionics master.
If unsuccessful, recognize that all autopilot functionality will be
lost so plan your flight accordingly.
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