Well, I don't know if anyone else has (had) this problem or if it has be posted elsewhere before but I have ALWAYS had a problem with my CS 767. After a while in flight and the autopilot is on the aircraft will for no apparent reason go into an uncontrollable flat spin down to the ground and crash, this is the only aircraft that does this and I have updated it to the latest patch. Unfortunately due to this event often happening I get discouraged and have no interest in flying this aircraft anymore, thus I have put the aircraft into retirement. Has anyone experienced this with the 767? (going into a flat spin)