# NTSB Accident SEA99LA089
> **Weatherly 620B** · 1999-06-21 · TETONIA, ID, USA · MINR
## Event
- **NTSB number:** SEA99LA089
- **Event ID:** 20001212X19119
- **Type:** Accident
- **Date:** 1999-06-21
- **Location:** TETONIA, ID, USA
- **Coordinates:** 43.850681, -111.109275
## Injuries
- **Highest injury:** MINR
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 1
- **Uninjured:** 0
- **Total aboard:** 1
## Aircraft
- **Make:** Weatherly
- **Model:** 620B
- **Registration:** N2033N
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

A failure of the right magneto drive gear shaft. Factors include the absence of any suitable terrain on which to perform an emergency landing, and the rough/uneven condition of the terrain on which the pilot was forced to land.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=SEA99LA089) · AI Analytics · CC0 1.0*