# NTSB Accident LAX94LA172
> **ROBINSON R-22B** · 1994-03-23 · SIMI VALLEY, CA, USA · NONE
## Event
- **NTSB number:** LAX94LA172
- **Event ID:** 20001206X00939
- **Type:** Accident
- **Date:** 1994-03-23
- **Location:** SIMI VALLEY, CA, USA
- **Coordinates:** 34.249351, -118.779998
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 2
- **Total aboard:** 2
## Aircraft
- **Make:** ROBINSON
- **Model:** R-22B
- **Registration:** N4081P
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

THE STUDENT PILOT'S IMPROPER HOVERING AUTOROTATION BY ALLOWING THE HELICOPTER TO DRIFT LATERALLY AND REARWARD, RESULTING IN THE HELICOPTER ROLLING OVER DURING TOUCHDOWN, AND THE FLIGHT INSTRUCTOR'S INADEQUATE SUPERVISION OF THE FLIGHT.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=LAX94LA172) · AI Analytics · CC0 1.0*