Accident Overview
A Cessna 421C airplane crashed after departing controlled flight while receiving radar vectors for an approach to land. The aircraft subsequently impacted terrain. Witnesses reported hearing the engines operating before the crash.
Investigation Findings
Investigators examined the airplane and found no mechanical anomalies. The aircraft appeared to have been operating normally prior to the accident.
Weather Conditions
Within an hour of the accident, the pilot of a Boeing 727 reported that his airplane accumulated a 'quick load' of ice during his descent to land at the same airport. This observation indicates potential icing conditions in the area at the time of the accident.
Sequence of Events
The accident airplane was under radar vector guidance from air traffic control for an approach. During this phase, it departed controlled flight and crashed. No additional information about the specific nature of the loss of control is available from the source.
Conclusion
The investigation did not identify any mechanical issues with the airplane. The presence of icing conditions, as reported by another pilot, may be relevant, but the source does not explicitly state a cause for the accident.