ASN Wikibase Occurrence # 222458
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| Date: | Saturday 4 March 2017 |
| Time: | 00:23 |
| Type: |  Cessna 421B |
| Owner/operator: | Private |
| Registration: | N421KL |
| MSN: | 421B0015 |
| Year of manufacture: | 1970 |
| Total airframe hrs: | 7522 hours |
| Engine model: | Continental GTSIO-520-D21 |
| Fatalities: | Fatalities: 1 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Canton, GA -
 United States of America
|
| Phase: | Approach |
| Nature: | Private |
| Departure airport: | Tulsa, OK (RVS) |
| Canton, GA (CNI) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The 69-year-old commercial pilot was making a personal cross-country flight in the newly-purchased airplane. When the airplane was on final approach to the destination airport in night visual meteorological conditions, airport surveillance video showed it pitch up and roll to the right. The airplane then descended in a nose-down attitude to impact in a ravine on the right side of the runway. During the descent over the ravine the right wing came in contact with a powerline that briefly cut power to the airport. Postaccident examination of the airframe, engines, and their components revealed no evidence of mechanical anomalies or malfunctions that would have precluded normal operation.
The pilot's toxicology findings identified five different impairing medications: clonazepam, temazepam, hydrocodone, nortriptyline, and diphenhydramine. Although the results were from cavity blood and may not accurately reflect antemortem levels, the hydrocodone, temazepam, and diphenhydramine levels were high enough to likely have had some psychoactive effects. While the exact effects of these drugs in combination are not known, it is likely that the pilot was impaired to some degree by his use of this combination of medications, which likely contributed to his failure to maintain control of the airplane.
Probable Cause: The pilot's failure to maintain control of the airplane during a night visual landing approach. Contributing to the accident was the pilot's impairment due to his use of a combination of medications.
Accident investigation:
 |
|
Sources:
NTSB
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 02-Mar-2019 14:45 | ASN Update Bot | Added |
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