# NTSB Accident ERA21LA121
> **ROBINSON HELICOPTER CO R66** · 2021-01-30 · Knoxville, TN, USA · NONE
## Event
- **NTSB number:** ERA21LA121
- **Event ID:** 20210130102576
- **Type:** Accident
- **Date:** 2021-01-30
- **Location:** Knoxville, TN, USA
- **Coordinates:** 35.801686, -84.145919
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 1
- **Total aboard:** 1
## Aircraft
- **Make:** ROBINSON HELICOPTER CO
- **Model:** R66
- **Registration:** N660TN
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

The pilot’s failure to maintain directional control of the helicopter, which resulted in rear portion of the right skid contacting the ground and a subsequent dynamic rollover.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=ERA21LA121) · AI Analytics · CC0 1.0*