# NTSB Accident GAA16CA296
> **ROBINSON HELICOPTER R22** · 2016-06-07 · Cahokia/St. Louis, IL, USA · NONE
## Event
- **NTSB number:** GAA16CA296
- **Event ID:** 20160609X45739
- **Type:** Accident
- **Date:** 2016-06-07
- **Location:** Cahokia/St. Louis, IL, USA
- **Coordinates:** 38.570278, -90.154998
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 2
- **Total aboard:** 2
## Aircraft
- **Make:** ROBINSON HELICOPTER
- **Model:** R22
- **Registration:** N931SH
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

The flight instructor's delayed remedial action and his failure to remain vigilant as the helicopter entered the weathercock stability region, in gusting wind conditions, resulting in loss of tail rotor effectiveness and ground impact.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=GAA16CA296) · AI Analytics · CC0 1.0*