Hawker Beechcraft Corp. 58 N3217L accident near Cleveland, Ohio

Probable cause

The pilot experienced spatial disorientation during the inital climb causing him to lose control of the airplane.

NTSB analysis

The pilot was hired by the airplane operator for a positioning flight. The pilot departed at night in a northerly right turn over Lake Erie from a lake shore airport. The moon and city associated with the airport were south of his flight path. The airplane was observed descending in the right hand turn and subsequently impacting the lake. An examination of the recovered wreckage revealed no preimpact anomalies, and an engine monitor recorded sensor readings consistent with both engines being at a high power until the recorded data stopped. The pilot had a history of back pain and had been regularly and recently using a potentially sedating muscle relaxant, which could cause impairment. He had heart disease identified during the autopsy that may have increased his risk of sudden cardiac death. He was also at high risk for obstructive sleep apnea, which commonly causes fatigue and cognitive impairment; however, the investigation could not conclusively identify that the pilot was impaired. The maneuvering of the aircraft and lack of outside visual references soon after takeoff made the situation conducive to spatial disorientation.

Text from the NTSB. Open the NTSB docket for CHI08FA066 for the full record.