# NTSB Accident WPR12CA056
> **ROBINSON HELICOPTER R22 BETA** · 2011-12-07 · Waipahu, HI, USA · NONE
## Event
- **NTSB number:** WPR12CA056
- **Event ID:** 20111207X35846
- **Type:** Accident
- **Date:** 2011-12-07
- **Location:** Waipahu, HI, USA
- **Coordinates:** 21.388334, -158.008056
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 2
- **Total aboard:** 2
## Aircraft
- **Make:** ROBINSON HELICOPTER
- **Model:** R22 BETA
- **Registration:** N817AB
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

The certified flight instructor's delayed remedial action and inadequate supervision during a practice autorotation. Contributing to the accident was the student pilot's excessive application of the throttle.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=WPR12CA056) · AI Analytics · CC0 1.0*