# NTSB Accident CEN16LA039
> **ROBINSON HELICOPTER COMPANY R44 II** · 2015-11-13 · Alpine, TX, USA · SERS
## Event
- **NTSB number:** CEN16LA039
- **Event ID:** 20151116X85351
- **Type:** Accident
- **Date:** 2015-11-13
- **Location:** Alpine, TX, USA
- **Coordinates:** 30.119443, -103.633056
## Injuries
- **Highest injury:** SERS
- **Fatal:** 0
- **Serious:** 2
- **Minor:** 1
- **Uninjured:** 1
- **Total aboard:** 4
## Aircraft
- **Make:** ROBINSON HELICOPTER COMPANY
- **Model:** R44 II
- **Registration:** N449MC
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

The pilot’s failure to maintain adequate rotor speed while maneuvering at low altitude, which resulted in a descent from which he was unable to recover. Contributing to the accident was the pilot's decision to conduct the flight at or near the helicopter's performance limit, which precluded recovery of the rotor speed in sufficient time to avoid the accident.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=CEN16LA039) · AI Analytics · CC0 1.0*