Problem with GPS and AHRS difference and a hard landing of the drone


we ran into a little problem with our drone, hope you guys can help me out with finding the problem.

The problem started with the error message “GPS and AHRS difference by 10m” sometimes more. So far I never had this message with any drone. So we disconnected the battery, connected it again, no error message and the copter could be started. The flight was okay, no real problems. After changing the battery, the same message comes, we did the same thing, short flight, everything was okay.

The next day, same location, again the message, but this time the flight was very instable with holding the height. We landed, restarted the drone and did another flight, first it seemed to be okay, but shortly the drone goes down, we tried to give more throttle, without any results and the drone did hard landing. So far, only the landing gear is damaged.

You can check the logfile and here the part, where the crash from the last flight happened.


So far, I didn´t find the real reason for this, hope you can find more in the logfiles than I did.

best regards