Accident
The aircraft collided with the side of a hill during a descent. The pilot had canceled his IFR clearance, after which radar services were terminated and a frequency change was approved. Shortly thereafter, the aircraft was observed flying beneath the clouds toward the hill with which it collided.
Witness Reports
Witnesses reported hearing the engine and seeing the aircraft enter clouds, followed by the noise of an explosion.
Weather Considerations
The weather at the time of the accident was instrument meteorological conditions (IMC).
Operational Status
No operational difficulties were reported or noted prior to the accident.