# NTSB Accident ERA09LA523
> **CESSNA 208** · 2009-09-15 · Sheffield, MA, USA · NONE
## Event
- **NTSB number:** ERA09LA523
- **Event ID:** 20090915X12034
- **Type:** Accident
- **Date:** 2009-09-15
- **Location:** Sheffield, MA, USA
- **Coordinates:** 42.097041, -73.356452
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 6
- **Total aboard:** 6
## Aircraft
- **Make:** CESSNA
- **Model:** 208
- **Registration:** N336DN
- **FAR Part:** 135
- **Engines:** 1
- **Damage:** DEST
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

A total loss of engine power due to a failure of the 1st stage sun gear output splines for unknown reasons, which resulted in a power turbine overspeed condition, with subsequent blade distress/release.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=ERA09LA523) · AI Analytics · CC0 1.0*