D100/ GPS/ Autopilot failure.

[RV10flyer]

On my RV-10, I haven't been able to get AP74 autopilot to capture GPS signal with D100 since last software update last year. A/P works fine with VOR.

A separate problem happened only on the last flight: Airspeed very high throughout flight (50 to 70 knots higher that shown on conventional airspeed indicator).

Any suggestions?

 

[Dynon]

When you use the NAVSRC to select the GPS side of things, is there a CDI that appears?

For the IAS issue - IAS is pitot / static based, so if there is water or another obstruction - more likely on the static line side -
that is causing it to deliver lower pressure to the ADAHRS than is truly there, you'd see artificially high IAS. Was altitude behaving normally?