# NTSB Accident WPR10FA133
> **EUROCOPTER EC135** · 2010-02-14 · Cave Creek, AZ, USA · FATL
## Event
- **NTSB number:** WPR10FA133
- **Event ID:** 20100214X92140
- **Type:** Accident
- **Date:** 2010-02-14
- **Location:** Cave Creek, AZ, USA
- **Coordinates:** 33.848056, -111.925277
## Injuries
- **Highest injury:** FATL
- **Fatal:** 5
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 0
- **Total aboard:** 5
## Aircraft
- **Make:** EUROCOPTER
- **Model:** EC135
- **Registration:** N127TS
- **FAR Part:** 091
- **Engines:** 2
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

The sudden and inadvertent lowering of the collective to near the lower stop, followed by a simultaneous movement of the collective back up and the cyclic control to a nearly full-aft position, which resulted in the main rotor disc diverging from its normal plane of rotation and striking the tail rotor drive shaft and culminated in a loss of control and subsequent impact with terrain. Contributing to the accident was absence of proper cockpit discipline from the pilot.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=WPR10FA133) · AI Analytics · CC0 1.0*