5-2
Abnormal Procedures
5 Abnormal Procedures
GENERAL FAILURE MODE INFORMATION
The only failure modes that result in the loss of a DFC-series
autopilot are when all of the system AHRS are unavailable (Red-
Xs over the attitude display), the autopilot has completely failed or
lost power, or when all of the IFDs have no power.
Each autopilot contains an internal data recorder for use during
service operations. The contents of the data logs remain the
property of Avidyne. If an anomalous behavior is observed with
the autopilot, pressing the “GS” button on the autopilot control
panel multiple times will produce a series of events in the data log
that will aid the Avidyne Service Center in finding and analyzing
the data logs during troubleshooting operations.
Some failure modes identified in this section do not affect the
functioning of the AHRS and therefore allow continued use of the
autopilot.
In all cases, basic airmanship should be exercised and
fundamentals utilized such as maintain aircraft control, analyze
the situation, and take proper action.
Refer to the Release 9.2 or later IFD Pilot Guide for more detail
on the IFD-related system malfunctions.
The following failure modes result in no DFC100 autopilot
functionality:
o
Loss of all on-board AHRS
o
Loss of power to all on-board IFDs
o
Loss of autopilot power
o
Complete loss of system-wide Databus
o
Failure of all installed AHRS to align initially
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