# NTSB Accident WPR09LA460
> **ROBINSON HELICOPTER COMPANY R44 II** · 2009-09-20 · Valley Center, CA, USA · SERS
## Event
- **NTSB number:** WPR09LA460
- **Event ID:** 20090921X00617
- **Type:** Accident
- **Date:** 2009-09-20
- **Location:** Valley Center, CA, USA
- **Coordinates:** 33.133888, -116.919723
## Injuries
- **Highest injury:** SERS
- **Fatal:** 0
- **Serious:** 2
- **Minor:** 0
- **Uninjured:** 0
- **Total aboard:** 2
## Aircraft
- **Make:** ROBINSON HELICOPTER COMPANY
- **Model:** R44 II
- **Registration:** N4174P
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

The failure of the engine’s camshaft due to fatigue of unknown origin.

---
*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=WPR09LA460) · AI Analytics · CC0 1.0*