# NTSB Accident DEN01FA056
> **Beech V35B** · 2001-02-26 · Green River, UT, USA · FATL
## Event
- **NTSB number:** DEN01FA056
- **Event ID:** 20010306X00545
- **Type:** Accident
- **Date:** 2001-02-26
- **Location:** Green River, UT, USA
- **Coordinates:** 39.122776, -109.857498
## Injuries
- **Highest injury:** FATL
- **Fatal:** 1
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 0
- **Total aboard:** 1
## Aircraft
- **Make:** Beech
- **Model:** V35B
- **Registration:** N4637M
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** DEST
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## 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.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=DEN01FA056) · AI Analytics · CC0 1.0*