Pilot’s Operating Handbook Section 901
EXTRA 500 Avidyne IFDs and CDU
901.3 Section 3 – Emergency Procedures
901.3.a Loss of ADAHRS
Both IFDs will automatically revert to remaining ADAHRS.
Refer to mechanical stand-by instrument(s).
If right IFD does not switch to PFD mode automatically, press
PFD button on right IFD for attitude information.
If neither IFD displays attitude attempt system recovery by
cycling both
IFD circuit breakers for 2 – 3 seconds (ensure not
longer than 20 seconds).
Note Following a lightning strike check indication of IFDs against
standby instruments to exclude potential misleading
information.
Note Consider using the autopilot to reduce workload.
Without ADAHRS input the S-TEC 55X autopilot still provides
the following capabilities:
• NAV GPSS mode to fly the GPS flight plan
• Vectors mode will function in NAV GPSS.
• HDG mode will engage but will not be functional – annunciated
yellow on PFD.
• NAV mode will not be functional
• VS and ALT modes will function but target altitude capture is
not possible.
901.3.b Loss of GPS
Both IFDs will automatically revert to remaining GPS receiver.
901.3.c Loss of VHF Nav/Com
Pilot to utilize remaining nav/com.
901.3.d Loss of Control Display Unit:
Pilot to utilize the Right IFD for Flight Planning and
Com/Nav/XPDR tuning.
26. January 2011
901-5
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