# NTSB Accident ANC08FA053
> **EUROCOPTER AS 350 B2** · 2008-04-15 · Chickaloon, AK, USA · FATL
## Event
- **NTSB number:** ANC08FA053
- **Event ID:** 20080421X00524
- **Type:** Accident
- **Date:** 2008-04-15
- **Location:** Chickaloon, AK, USA
- **Coordinates:** 61.838333, -147.376937
## Injuries
- **Highest injury:** FATL
- **Fatal:** 4
- **Serious:** 1
- **Minor:** 0
- **Uninjured:** 0
- **Total aboard:** 5
## Aircraft
- **Make:** EUROCOPTER
- **Model:** AS 350 B2
- **Registration:** N213EH
- **FAR Part:** 135
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

An in-flight overtorque of the engine-to-transmission driveshaft resulting in disconnection of the main transmission from the engine. The overtorque likely occurred due to an in-flight main rotor blade contact with snow-covered terrain, precluding significant main rotor blade damage and ground scarring. Contributing to the severity of the surviving occupant's injuries was the helicopter operator's failure to properly monitor their satellite flight-following system and to immediately institute a search once the system reported that the helicopter was overdue.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=ANC08FA053) · AI Analytics · CC0 1.0*