Garmin 20 Pilot's Manual page 131

Problem
TER (Terrain) flag
No traffic display
"Special Terrain" message
TCAD flag
SKYW flag
RDR (Amber) flag
LINK flag
Possible Cause
Terrain database
Altitude source
ADS-B system installation
Capstone/General Aviation setup
TCAD Installation
Skywatch Installation
Radar Installation
FIS Sensor Installation
Action
Ensure that the proper database is
used for your location and it passed
the startup test
Have dealer/installer check for
proper altitude input
You must have the ADS-B system
installed
If you do have an ADS-B system,
check the antennas and other com-
ponents for proper operation
Have dealer/installer check for
proper MX20 setup
This is normal for the Capstone
installation
Have dealer/installer check for
proper MX20 setup
Ensure that the TCAD unit is
installed and functional.
Ensure that the Skywatch unit is
installed and functional.
Ensure that the Radar unit is
installed and functional.
Ensure that the FIS unit is installed
and functional.
Appendix
Troubleshooting
119