Incident
While the aircraft was in normal cruise, the aft cargo door opened unexpectedly. The pilot responded by shutting down the right engine and initiating an emergency landing. During the final approach, the airplane struck overhead power cables and crashed. The pilot sustained slight injuries, and the aircraft was damaged beyond repair.
Probable Cause
The official investigation determined that the probable cause of the accident was a collision with wires/poles on final approach after inadequate preflight preparation. The following contributing factors were reported: improper securing of the cargo door, improper pilot action, forced landing off airport on land, an open door or panel in flight, a lateral control problem, the aft cargo door opening in flight, and failure to maintain altitude.