# NTSB Accident CEN12LA289
> **ROBINSON HELICOPTER COMPANY R44 II** · 2012-05-10 · Grants, NM, USA · NONE
## Event
- **NTSB number:** CEN12LA289
- **Event ID:** 20120511X40109
- **Type:** Accident
- **Date:** 2012-05-10
- **Location:** Grants, NM, USA
- **Coordinates:** 35.150863, -107.829208
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 2
- **Total aboard:** 2
## Aircraft
- **Make:** ROBINSON HELICOPTER COMPANY
- **Model:** R44 II
- **Registration:** N7523S
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

The loss of engine power due to an excessively rich fuel mixture that occurred during operations at idle power settings at a high density altitude. Contributing to the accident was the flight instructor’s poor decision-making in choosing to practice an unnecessary autorotation over mountainous terrain.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=CEN12LA289) · AI Analytics · CC0 1.0*