2 fatalities

Pilot Impaired by Alcohol, Flew into Adverse Weather and Mountains, NTSB Finds (N6623C)

Waynesville, United States of AmericaFlight

On November 24, 1983, a Cessna 414 Chancellor (registration N6623C) operated by Martin Tool Works was involved in an aviation accident near Waynesville, United States of America in flight. 2 people were killed. Investigators recorded the probable cause as: The pilot encountered weather conditions including clouds and rain, continued flight into known adverse weather, and at night over mountainous terrain, failed to maintain adequate altitude while impaired by alcohol, resulting in collision with terrain. This summary draws on records from the Bureau of Aircraft Accidents Archives (B3A).

Sourcesthe Bureau of Aircraft Accidents Archives (B3A)Primary reportUpdated 2026-06-11Data APIEditorial standards

On a departure at 1417 CST, the aircraft climbed to 7,600 feet then experienced altitude excursions before impacting mountainous terrain at 6,000 feet near Snowbird VOR. The pilot had a blood alcohol level of 0.4‰. Both occupants died.

Flight History

The aircraft departed at 1417 Central Standard Time. Radar track data showed the aircraft climbing to and maintaining 7,600 feet until about 1733 Eastern Standard Time, at which point it was approximately 28–30 miles north of the Knoxville VOR. The aircraft then descended and crossed the Snowbird VOR at about 6,700 feet. Several upward and downward altitude excursions followed. After crossing Snowbird VOR, the aircraft turned south and again exhibited altitude excursions. The final radar contact was at 6,100 feet, about 1 mile from the crash site.

Impact

The aircraft impacted mountainous terrain at approximately 6,000 feet mean sea level (MSL), about 11 miles from the destination. Both occupants were killed.

Meteorological Conditions

At the crash site, meteorological conditions included low clouds and precipitation.

Pilot Toxicological Findings

The pilot's blood alcohol level was 0.4‰.

Official Findings

The National Transportation Safety Board (NTSB) determined the probable cause as the pilot's flight into known adverse weather (including clouds and rain), continued operation under such conditions, inadequate altitude management, and impairment from alcohol, all while operating over mountainous terrain at night.