# NTSB Accident WPR09FA459
> **ROBINSON HELICOPTER R22 BETA** · 2009-09-20 · Forest Grove, OR, USA · FATL
## Event
- **NTSB number:** WPR09FA459
- **Event ID:** 20090920X34134
- **Type:** Accident
- **Date:** 2009-09-20
- **Location:** Forest Grove, OR, USA
- **Coordinates:** 45.810001, -123.178337
## Injuries
- **Highest injury:** FATL
- **Fatal:** 2
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 0
- **Total aboard:** 2
## Aircraft
- **Make:** ROBINSON HELICOPTER
- **Model:** R22 BETA
- **Registration:** N956SH
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

The flight crew’s failure to maintain adequate main rotor speed while maneuvering, which resulted in a main rotor blade stall and an uncontrolled descent into terrain.

---
*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=WPR09FA459) · AI Analytics · CC0 1.0*