Accident
Following the cancellation of a special VFR flight plan out of the Hamilton AFB control zone, the crew initiated a descent to Novato-Gnoss Field under VFR conditions in adverse weather. During the approach, the twin-engine airplane collided with the slope of a mountain and was destroyed. The wreckage was located two days later, and both pilots were found dead.
Weather Conditions
At the time of the accident, weather conditions were poor, characterized by low ceiling, rain, and fog.
Investigation Findings
The official investigation determined that the accident was a controlled flight into terrain. The probable cause was that the crew failed to follow approved procedures for an approach to Novato-Gnoss Field Airport.