What exactly is making it unusable?
Most appreciative of the geography lesson, most helpful.
After 400 hours of running perfectly, the attitude screen went nuts, altitude to 52000 ft, airspeed 0, overspeed alarm blaring, etc., etc. I've had several iterations of the above, but nothing that stays fixed. At this point, the attitude screen is a big red x, with the message of an internal error of the adahrs failure and Pitot sensor internal error. The map and EMS seems to be usually working although at times all three screens are big red x's..
Dynon has been incredible. First we replaced the ADAHRS without help, after about 15 minutes it failed. Then they actually gave me a new display, and a second ADAHRS, and it has worked as described above. The error on the second ADAHRS is now consistently that it is corrupted.
The plane is apart now and I have not found any shorts and the wiring seems to all be intact. During the process the pitot system to have developed a leak (although by that time. it had been on and off a few times). I have gone completely through the tubing, replaced every connection, including the static source as well.
In the past, I have added the Aithre Shiel Carbon Monoxide system as we'll as the AP knob modules, but that was at least 100 hours ago and they have worked perfectly.
Any suggestions other than geographical would be appreciated.