# NTSB Accident ERA09FA429
> **CIRRUS SR-22** · 2009-07-31 · Ravenswood, WV, USA · FATL
## Event
- **NTSB number:** ERA09FA429
- **Event ID:** 20090731X10108
- **Type:** Accident
- **Date:** 2009-07-31
- **Location:** Ravenswood, WV, USA
- **Coordinates:** 39.034442, -81.738334
## Injuries
- **Highest injury:** FATL
- **Fatal:** 1
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 0
- **Total aboard:** 1
## Aircraft
- **Make:** CIRRUS
- **Model:** SR-22
- **Registration:** N581DS
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** DEST
## Conditions
- **Light:** NDRK
- **Weather:** IMC
## Probable cause

The pilot's improper modification of the certified, on-board oxygen system, which resulted in incapacitation due to hypoxia, and the airplane's subsequent uncontrolled descent into terrain.

---
*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=ERA09FA429) · AI Analytics · CC0 1.0*