What happened
A flight operating out of Greybull Airport was conducting a local test flight when the aircraft experienced mechanical issues. The flight was occupied by three crew members and one passenger at the time of the incident.
During the initial climb phase following takeoff, the crew identified technical difficulties involving the right engine. In response to this malfunction, the captain attempted to maneuver the aircraft back toward the airport. During this turning maneuver, the plane lost necessary altitude and impacted the ground.
The accident resulted in three fatalities among the crew members, while the single passenger sustained serious injuries.
Findings
Official investigations into the crash concluded that the specific reason for the accident could not be definitively established.