What happened
On the day of the accident, a twin-engine aircraft was performing a left base landing approach approximately 500 feet above the ground. An observer witnessed the aircraft suddenly pitch downward and enter a spinning motion, completing three full rotations before striking the terrain in a nose-down position. The impact occurred in an open field located northeast of Bowie, Texas. Following the crash, a fire broke out and largely destroyed the wreckage. The accident resulted in two fatalities, involving the pilot and his 10-year-old son.
Findings
Investigations into the wreckage found no evidence of mechanical failures or malfunctions that would have prevented the aircraft from operating normally prior to the crash. While another pilot in the area reported experiencing severe turbulence at similar altitudes, GPS data showed that the aircraft's airspeed had dropped 10 knots below the recommended speed for turbulent conditions during the approach.
However, medical examinations of the pilot revealed significant atherosclerotic disease and an acute, nonocclusive thrombosis in the left anterior descending coronary artery. The medical examiner concluded that the pilot likely suffered an acute cardiac event while operating the aircraft. It is believed this medical emergency led to pilot incapacitation and the subsequent loss of control during the landing phase.