What happened
During a scheduled test flight originating from Wichita, an unidentified aircraft encountered a critical failure while operating under negative G-force conditions. The loss of electrical power caused the aircraft to become uncontrollable, leading to a crash in the vicinity of Skiatook, situated approximately 15 miles north of Tulsa.
The accident resulted in three fatalities and left one crew member with injuries.
Findings
Investigations into the accident determined that the primary factor was the loss of electrical power. This failure was specifically attributed to a defective constant speed drive within the aircraft's systems.