# NTSB Accident CEN19LA250
> **ROBINSON HELICOPTER COMPANY R44 II** · 2019-08-03 · Lyons, NE, USA · MINR
## Event
- **NTSB number:** CEN19LA250
- **Event ID:** 20190803X74951
- **Type:** Accident
- **Date:** 2019-08-03
- **Location:** Lyons, NE, USA
- **Coordinates:** 41.9375, -96.473052
## Injuries
- **Highest injury:** MINR
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 1
- **Uninjured:** 0
- **Total aboard:** 1
## Aircraft
- **Make:** ROBINSON HELICOPTER COMPANY
- **Model:** R44 II
- **Registration:** N440EM
- **FAR Part:** 137
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

The engine's low cylinder compression, which resulted in low rotor rpm and a subsequent dynamic rollover following landing on soft terrain.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=CEN19LA250) · AI Analytics · CC0 1.0*