# NTSB Accident WPR10FA112
> **EUROCOPTER AS350 B3** · 2010-01-17 · Reno, NV, USA · NONE
## Event
- **NTSB number:** WPR10FA112
- **Event ID:** 20100117X91508
- **Type:** Accident
- **Date:** 2010-01-17
- **Location:** Reno, NV, USA
- **Coordinates:** 39.526111, -119.796112
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 3
- **Total aboard:** 3
## Aircraft
- **Make:** EUROCOPTER
- **Model:** AS350 B3
- **Registration:** N904CF
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

The improper installation of the engine-to-main gear box flex coupling, which resulted in the failure of the flex coupling and a loss of power to the rotor system during takeoff. Contributing to the accident was the mechanic who removed the engine's failure to follow the operator’s maintenance procedures. Also contributing was the Quality Assurance inspector's failure to follow the operator’s post-maintenance inspection requirements.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=WPR10FA112) · AI Analytics · CC0 1.0*