Test Flight Crash Near Skiatook, Oklahoma (54-2676)

Incident Overview During a test flight departing from Wichita, the aircraft experienced a loss of electrical power while operating in negative G conditions. The loss of power led to a loss of control, and the aircraft crashed near Skiatook, approximately 15 miles north of Tulsa.## Casualties The accident resulted in the deaths of three crew members. A fourth crew member was injured in the incident.## Probable Cause The official investigation determined that the probable cause of the accident was the loss of electrical power due to a defective constant speed drive. The failure of this component led to the loss of electrical power, which in turn caused the aircraft to become uncontrollable during the test flight.