NTSB investigators either traveled in support of this investigation or conducted a significant amount of investigative work without any travel, and used data obtained from various sources to prepare this aircraft accident report.
About 2 hours after departure, radar data tracked the airplane at 7,000 feet before the airplane then initiated a right, descending turn before disappearing from radar. Witnesses reported seeing the airplane flying low, descending, making several turns, before impacting terrain. Impact signatures were consistent with a steep, nose-low attitude. An examination of the airframe and engine did not reveal any preimpact anomalies. The reason for the pilot's loss of control could not be determined.