ASN Wikibase Occurrence # 45992
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| Date: | Monday 26 February 2001 |
| Time: | 14:29 |
| Type: |  Beechcraft V35B Bonanza |
| Owner/operator: | Private |
| Registration: | N4637M |
| MSN: | D-10147 |
| Total airframe hrs: | 2473 hours |
| Engine model: | Continental IO-550-B |
| Fatalities: | Fatalities: 1 / Occupants: 1 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Green River, UT -
 United States of America
|
| Phase: | En route |
| Nature: | Private |
| Departure airport: | Gunnison-Crested Butte Regional Airport, CO (GUC/KGUC) |
| Fresno Yosemite International Airport, CA (FAT/KFAT) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
On February 26, 2001, at 1429 mountain standard time, a Beech V35B, N4637M, was destroyed following impact with terrain during cruise near Green River, Utah. The non-instrument rated private pilot, the sole occupant in the airplane, was fatally injured. The airplane was being operated by the pilot under Title 14 CFR Part 91. The cross-country personal flight originated from Gunnison, Colorado, approximately 1 hour 45 minutes before the accident. Visual meteorological conditions prevailed for the takeoff; however, the meteorological conditions at the accident site are unknown. The pilot had not filed a flight plan; however, family members said the pilot was en route to Fresno, California.
The pilot had been skiing in the Rocky Mountains (elevation 8,900 feet) for a week. He departed in his non-pressurized single-engine airplane and climbed up to 21,600 feet; he had no supplemental oxygen onboard. Approximately 1 hour 45 minutes into the flight, the airplane reached a maximum altitude of 22,100 feet before entering a rapid descent. The airplane impacted mountainous terrain in an uncontrolled spin. Examination of the airplane and engine revealed no evidence of any pre-impact discrepancies. The Emergency Locator Transmitter (ELT) functioned properly, and the airplane was located by the Civil Air Patrol the following day
.
Probable Cause: The pilot's failure to maintain aircraft control as a result of incapacitation (from hypoxia) due to the in-flight decision to fly at altitudes where oxygen is required, without oxygen available.
Accident investigation:
 |
|
Sources:
NTSB: https://www.ntsb.gov/_layouts/ntsb.aviation/brief.aspx?ev_id=20010306X00545&key=1
Location
Images:
Photo: NTSB
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 28-Oct-2008 00:45 | ASN archive | Added |
| 21-Dec-2016 19:24 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 10-Dec-2017 10:33 | ASN Update Bot | Updated [Source, Narrative] |
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