Well I really didn't want to have to be posting one of these but wondered if some more knowledgeable folk could shed some more light on the situation. The 2 flights the night before the incident seemed fine. 2 days earlier I had some compass issues which was a first since ownership (60+ flights). This happened in Northern BC, Canada some 1500km away. The app put the craft in Atti mode so I could fly it home, turn off drone, re-calibrate compass and everything appeared back to normal. Bring it forward to the 17th and I was out at Kluane Lake here in the Yukon (Canada) and the compass starts acting crazy, the drone is all over the place. I bring it back in Atti mode. Power down/up, re-calibrate compass again, take off GPS-20 SATs, everything seemed fine. Was flying around to test all ok (just out of eye-sight) up and down the lake, then all of a sudden it dies on me, no word of warning. I saw on the screen it just cut out. Also what I find very weird is the video cuts out exactly where it falls. I located the drone via the Maps on GPS, fortunately not in the lake! Although it make well just have been, seems the motors are clogged with grit same will the gimbal, blades and shell ruined. The P3 was still powered on when I located it. Attached flight log.