# NTSB Accident WPR17LA143
> **ROBINSON HELICOPTER COMPANY R44 II** · 2017-07-06 · Ronan, MT, USA · SERS
## Event
- **NTSB number:** WPR17LA143
- **Event ID:** 20170706X21348
- **Type:** Accident
- **Date:** 2017-07-06
- **Location:** Ronan, MT, USA
- **Coordinates:** 47.476387, -114.055274
## Injuries
- **Highest injury:** SERS
- **Fatal:** 0
- **Serious:** 1
- **Minor:** 1
- **Uninjured:** 0
- **Total aboard:** 2
## Aircraft
- **Make:** ROBINSON HELICOPTER COMPANY
- **Model:** R44 II
- **Registration:** N442DR
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

The pilot's failure to maintain adequate airspeed, which resulted in a loss of tail rotor effectiveness during a low-altitude orbiting maneuver and a subsequent hard landing.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=WPR17LA143) · AI Analytics · CC0 1.0*