Originally Posted by strahler13
From the owner:
I've dove all that a couple times and forwarded the info to Gynesis. The AHARS data looks good according to Gynesis. They have no idea why the gyro "tumbles". The AHARS works fine until you do some pitch maneuvers. Then it won't come back to level for about 2 minutes.
Mine had a somewhat similar problem about a year and a half ago. In my case, the attitude indicator would roll slowly onto its side after flying along for about 15 minutes or so, but mine would not correct itself once this happened.
The problem turned out to be micro cracks in the solder joints on the sensor core. I wonder if you might have a similar issue and that perhaps Genesys wasn't looking for something like this. It might be worth having them take a second look.