120
Appendix
Problem
Possible Cause
Action
XPDR flag
TIS-A Sensor Installation
Ensure that the TIS-A unit is
installed and functional.
ADSB flag
GDL 90 is reporting that its internal
GPS is not reporting a position or
is reporting an invalid position.
Note that ADS-B broadcasts do not
include position reports when this
flag is present.
Ensure the GDL 90 is installed and
functional. Ensure the GDL 90 GPS
antenna has a clear view of the sky
to receive GPS signals.
IDENT (green) flag
This is not a problem. This flag
appears when the GDL 90 is in the
Ident mode.
None required.
See the Installation Manual for additional troubleshooting procedures.
Troubleshooting
Summary of Contents for Mobile 20
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