# NTSB Accident GAA18CA247
> **ROBINSON HELICOPTER R44** · 2018-04-18 · Sonora, TX, USA · NONE
## Event
- **NTSB number:** GAA18CA247
- **Event ID:** 20180424X83850
- **Type:** Accident
- **Date:** 2018-04-18
- **Location:** Sonora, TX, USA
- **Coordinates:** 30.211666, -100.4775
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 2
- **Total aboard:** 2
## Aircraft
- **Make:** ROBINSON HELICOPTER
- **Model:** R44
- **Registration:** N4487D
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

The pilot’s failure to maintain clearance from trees while maneuvering at a low altitude.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=GAA18CA247) · AI Analytics · CC0 1.0*