Accident Sequence
The airplane stalled on final approach and impacted the ground short of the runway threshold, along the extended centerline of the runway. The nose then pitched down about 70 degrees before impact.
Witness Accounts
One witness reported that the airplane pitched "up and then back down and the wings started to rock back and forth some." Subsequently, the nose pitched down about 70 degrees and the airplane impacted the ground. Two other witnesses observed the airplane's wings "teeter slightly" before the airplane pitched 70 degrees nose low and impacted the ground.
Investigation Findings
Flight control continuity was confirmed at the accident site. No anomalies were found during testing of the engine, autopilot, and electrical trim system that would have prevented normal operation prior to the accident.