# NTSB Accident GAA17CA450
> **ROBINSON HELICOPTER COMPANY R44** · 2017-07-31 · Dunlap, IL, USA · MINR
## Event
- **NTSB number:** GAA17CA450
- **Event ID:** 20170731X71941
- **Type:** Accident
- **Date:** 2017-07-31
- **Location:** Dunlap, IL, USA
- **Coordinates:** 40.861667, -89.678611
## Injuries
- **Highest injury:** MINR
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 1
- **Uninjured:** 0
- **Total aboard:** 1
## Aircraft
- **Make:** ROBINSON HELICOPTER COMPANY
- **Model:** R44
- **Registration:** N344MM
- **FAR Part:** 137
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

The pilot’s failure to visually confirm that the helicopter was disconnected from hoses during refueling operations. Contributing to the accident was the pilot’s and ground crew’s misunderstanding of the hand signals.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=GAA17CA450) · AI Analytics · CC0 1.0*