Accident Overview
A corporate airplane was destroyed following an impact with rolling terrain and fire approximately 1.3 nautical miles northeast of the Mission Sioux Airport (0V6), Mission, South Dakota. The flight was en route to the Rapid City Regional Airport, Rapid City, South Dakota, located 114 nautical miles on a magnetic bearing of 284 degrees from 0V6.
The accident occurred during night meteorological conditions. A witness and communications with the airplane and pilot indicated that the pilot had a continuous duty time of approximately 21 hours, which began at least at 0414 mountain daylight time on the day prior to the accident date.
Wreckage Examination
The wreckage path measured 290 feet in length and was oriented on a magnetic heading of 290 degrees. Debris was distributed along 230 feet of the path. Propeller slash marks were present at the beginning of the wreckage path, and both propellers displayed twisting.
Aircraft Examination
Postaccident examination of components revealed a preexisting crack in the right turbocharger's exhaust. However, no indication of melting was found in the fuel lines adjacent to that area. No other system anomalies were noted during the examination.