What happened
The pilot reported that during the takeoff ground run, just prior to lift-off, a wind gust caught the plane from the left. When the wind diminished suddenly, the pilot's reaction was not fast enough, and the aircraft veered off the left side of the runway. The aircraft bogged down in the soft, muddy ground at the side of the runway and came to a stop nosedown.
The investigation
The pilot stated that during the takeoff ground run, just prior to lift-off, 'a wind gust caught plane from left.' He reported that when the wind diminished suddenly his reaction wasn't fast enough and the aircraft veered off the left side of the runway. The aircraft bogged down in the soft, muddy ground at the side of the runway, and came to a stop nosedown.
Findings
The pilot's failure to maintain directional control during takeoff resulted in the aircraft veering off the runway. Contributing factors included a wind gust that caught the plane from the left and the pilot's delayed reaction when the wind diminished.