ASN Wikibase Occurrence # 37211
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| Date: | Monday 7 August 1995 |
| Time: | 15:34 LT |
| Type: |  Beechcraft F33A Bonanza |
| Owner/operator: | Graham, Michael, A. |
| Registration: | N8014R |
| MSN: | CE-1510 |
| Total airframe hrs: | 326 hours |
| Engine model: | CONTINENTAL IO-520-BB(18) |
| Fatalities: | Fatalities: 2 / Occupants: 2 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Swan Lake, MT -
 United States of America
|
| Phase: | En route |
| Nature: | Private |
| Departure airport: | Cut Bank, MT (KCTB) |
| Spokane, WA (KGEG) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot reported via radio to Cedar City Flight Watch that he was VMC and climbing through 11,400 feet. Flight Watch provided weather information and approximately 1 minute later the pilot responded 'OK, roger that ah understand---.' A recording of this transmission revealed the pilot breathing heavily and forcefully and his rate of speech had slowed noticeably. Radar data at the time of this transmission showed the aircraft peaking in the climb and transitioning into a high rate of descent which continued until ground impact in mountainous terrain. Post-mortem examination revealed severe sclerosis with over 60% occlusion of the right artery and over 90% occlusion of the left anterior descending and circumflex branches. The examination revealed ankle fractures but no hand/wrist/finger fractures. The pilot was 36 years old and his twin brother reported a 'heart issue' 8-10 years earlier.
Probable Cause: the pilot's incapacitation due to a heart attack.
Accident investigation:
 |
|
Sources:
NTSB SEA95FA175
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 24-Oct-2008 10:30 | ASN archive | Added |
| 21-Dec-2016 19:23 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 09-Apr-2024 13:03 | ASN Update Bot | Updated [Time, Operator, Other fatalities, Departure airport, Destination airport, Source, Narrative, Category, Accident report] |
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