G1000 Heading Indicator Failure
I have a 2005 Cessna Stationair with a G1000 (panel with a separate autopilot (KAP 140). About once every 3-4 hrs of flight time, the Heading Indicator fails with a red X appearing where the heading bug used to be. Of course, this causes the autopilot to fail and the plane deviates off course. Surprisingly, there is no autopilot disconnect alarm at this point. I took it to my local avionics shop who tried to reproduce the problem for over an hour but were unable to do so. They said I should wait for a hard failure. They then took a guess and replaced the magnetometer which did not help the problem. This has been going on for over 18 months. Garmin is asking me to catch the data on a SD card in the top slot of the MFD. I am in the process of doing so but I don't see what the data will add to the current problem. It will just tell me flight conditions and location at the time of the failure. This failure could be catastrophic on an approach in IMC. I'm desperate to get this resolved and even willing to replace the entire system at considerable cost if I could be assured it would solve the problem. It is hard to believe that nobody else has had a problem like this. Any advice appreciated.