# NTSB Accident WPR09CA470
> **ROBINSON HELICOPTER COMPANY R44 II** · 2009-09-28 · Mt Charleston, NV, USA · MINR
## Event
- **NTSB number:** WPR09CA470
- **Event ID:** 20090928X05618
- **Type:** Accident
- **Date:** 2009-09-28
- **Location:** Mt Charleston, NV, USA
- **Coordinates:** 36.27111, -115.695831
## Injuries
- **Highest injury:** MINR
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 1
- **Uninjured:** 2
- **Total aboard:** 3
## Aircraft
- **Make:** ROBINSON HELICOPTER COMPANY
- **Model:** R44 II
- **Registration:** N29LE
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** DEST
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

The pilot's failure to maintain aircraft control and terrain clearance while maneuvering at a low altitude above high terrain.  Contributing to the accident was a downdraft and high density altitude.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=WPR09CA470) · AI Analytics · CC0 1.0*