# NTSB Incident WPR12IA248
> **EUROCOPTER AS 350 B2** · 2012-05-22 · Seattle, WA, USA · NONE
## Event
- **NTSB number:** WPR12IA248
- **Event ID:** 20120605X33610
- **Type:** Incident
- **Date:** 2012-05-22
- **Location:** Seattle, WA, USA
- **Coordinates:** 47.466945, -122.335281
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 2
- **Total aboard:** 2
## Aircraft
- **Make:** EUROCOPTER
- **Model:** AS 350 B2
- **Registration:** N105TV
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** MINR
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

Failure of maintenance personnel to ensure that the tail rotor pitch change link bolt was properly secured, which resulted in an in-flight separation of the bolt and subsequent vibration.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=WPR12IA248) · AI Analytics · CC0 1.0*