# NTSB Accident SEA04LA050
> **Cessna 170** · 2004-03-01 · Herron, WA, USA · FATL
## Event
- **NTSB number:** SEA04LA050
- **Event ID:** 20040322X00354
- **Type:** Accident
- **Date:** 2004-03-01
- **Location:** Herron, WA, USA
- **Coordinates:** 47.280555, -122.830276
## Injuries
- **Highest injury:** FATL
- **Fatal:** 2
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 0
- **Total aboard:** 2
## Aircraft
- **Make:** Cessna
- **Model:** 170
- **Registration:** N2534V
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** DEST
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

The failure of the left muffler while maneuvering, resulting in a carbon monoxide leak into the cabin rendering the pilot incapacitated, and the subsequent uncontrolled descent and impact with water.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=SEA04LA050) · AI Analytics · CC0 1.0*