# NTSB Incident CEN14IA329
> **EUROCOPTER AS 350 B3** · 2014-06-26 · Temple, TX, USA · NONE
## Event
- **NTSB number:** CEN14IA329
- **Event ID:** 20140630X31517
- **Type:** Incident
- **Date:** 2014-06-26
- **Location:** Temple, TX, USA
- **Coordinates:** 31.151666, -97.407501
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 3
- **Total aboard:** 3
## Aircraft
- **Make:** EUROCOPTER
- **Model:** AS 350 B3
- **Registration:** N808LF
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** MINR
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

The pilot’s failure to reposition the yaw servo hydraulic switch to the “on” position during the pretakeoff hydraulic system check, which resulted in a complete lack of hydraulic boost to the tail rotor system and increased the load required to move the control pedals and led to the pilot’s subsequent inability to manipulate the control pedals and his loss of yaw control.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=CEN14IA329) · AI Analytics · CC0 1.0*