# NTSB Accident ERA21LA171
> **ROBINSON HELICOPTER CO R66** · 2021-04-03 · Palmyra, PA, USA · SERS
## Event
- **NTSB number:** ERA21LA171
- **Event ID:** 20210404102861
- **Type:** Accident
- **Date:** 2021-04-03
- **Location:** Palmyra, PA, USA
- **Coordinates:** 40.286767, -76.576988
## Injuries
- **Highest injury:** SERS
- **Fatal:** 0
- **Serious:** 1
- **Minor:** 0
- **Uninjured:** 0
- **Total aboard:** 1
## Aircraft
- **Make:** ROBINSON HELICOPTER CO
- **Model:** R66
- **Registration:** N577DD
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

The pilot’s improper judgment to attempt a flight while impaired by medications, which resulted in the helicopter’s abnormal ground contact, loss of control, and collision with terrain.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=ERA21LA171) · AI Analytics · CC0 1.0*