Overview
The accident occurred during a local test flight at Greybull Airport. The aircraft was carrying one passenger and a crew of three.
Sequence of Events
After takeoff, while the aircraft was climbing, the crew encountered technical problems with the right engine. The captain decided to return to the airport and initiated a turn. During the turn, the aircraft lost altitude and crashed.
Casualties
The accident resulted in the deaths of all three crew members. The passenger sustained serious injuries.
Investigation
The official investigation determined that the exact cause of the accident could not be identified.