IFD500 Series Pilot Guide
7-10 General
GPS integrity is insufficient for L/VNAV
Approach
Transition to a non-L/VNAV approach and the appropriate
minima.
Altitude invalid - leg will not auto
sequence
In basic E-M aircraft where the IFD does not have baro
altitude input, this message will appear when the FMS
active leg terminates at an altitude. In this case, the FMS
flight plan will need to be manually sequenced to the next
leg. Failure to do so will cause the FMS to fly the
course/heading indefinitely.
AXP322 Lost GPS Position Data
ADS-B position data had previously been valid and then
transitioned to invalid. Check the ADS-B position source.
No communication with the VHF radio
Transition to a backup VHF com radio (if available) or
initiate lost communication procedures. Contact the Avidyne
Service Center or a dealer for service.
No Communication with Remote
Transponder
No data has been received from the remote transponder for
greater than 2 seconds. Contact the Avidyne Service
Center if this persists across power cycles.
L/VNAV Unavail.
Use LNAV MDA
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