# NTSB Accident SEA99LA151
> **ROTORDYNE 200** · 1999-08-31 · KENT, WA, USA · FATL
## Event
- **NTSB number:** SEA99LA151
- **Event ID:** 20001212X19656
- **Type:** Accident
- **Date:** 1999-08-31
- **Location:** KENT, WA, USA
- **Coordinates:** 47.360862, -122.099601
## Injuries
- **Highest injury:** FATL
- **Fatal:** 1
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 0
- **Total aboard:** 1
## Aircraft
- **Make:** ROTORDYNE
- **Model:** 200
- **Registration:** N85Z
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** DEST
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

The owner/builder's failure to properly torque the rotor blade retaining bolts.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=SEA99LA151) · AI Analytics · CC0 1.0*