# NTSB Accident CEN10CA485
> **ROBINSON HELICOPTER R22 BETA** · 2010-08-14 · Mack, CO, USA · NONE
## Event
- **NTSB number:** CEN10CA485
- **Event ID:** 20100818X30857
- **Type:** Accident
- **Date:** 2010-08-14
- **Location:** Mack, CO, USA
- **Coordinates:** 39.267501, -108.858329
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 2
- **Total aboard:** 2
## Aircraft
- **Make:** ROBINSON HELICOPTER
- **Model:** R22 BETA
- **Registration:** N404LE
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

The flight instructor's failure to maintain control of the helicopter during a practice autorotation, which resulted in a hard landing.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=CEN10CA485) · AI Analytics · CC0 1.0*