# NTSB Accident WPR09LA436
> **ROBINSON HELICOPTER R44** · 2009-09-03 · Torrance, CA, USA · NONE
## Event
- **NTSB number:** WPR09LA436
- **Event ID:** 20090908X85107
- **Type:** Accident
- **Date:** 2009-09-03
- **Location:** Torrance, CA, USA
- **Coordinates:** 33.803333, -118.339447
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 1
- **Total aboard:** 1
## Aircraft
- **Make:** ROBINSON HELICOPTER
- **Model:** R44
- **Registration:** N8361X
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

A main rotor overspeed due to the pilot’s failure to maintain rotor RPM within allowable limits during a practice autorotation.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=WPR09LA436) · AI Analytics · CC0 1.0*