# NTSB Accident WPR16LA075
> **ROBINSON HELICOPTER CO R66** · 2016-02-23 · Torrance, CA, USA · NONE
## Event
- **NTSB number:** WPR16LA075
- **Event ID:** 20160224X04410
- **Type:** Accident
- **Date:** 2016-02-23
- **Location:** Torrance, CA, USA
- **Coordinates:** 33.802501, -118.338607
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 1
- **Total aboard:** 1
## Aircraft
- **Make:** ROBINSON HELICOPTER CO
- **Model:** R66
- **Registration:** N266RH
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

A vibration of the helicopter, which resulted in an autorotation to soft terrain and subsequent impact of the tail boom with the main rotor. The reason for the vibration could not be determined because postaccident examination revealed no malfunctions or anomalies that would have precluded normal operation.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=WPR16LA075) · AI Analytics · CC0 1.0*