# NTSB Accident CHI06GA174
> **Bell UH-1H** · 2006-06-30 · Chicago, IL, USA · MINR
## Event
- **NTSB number:** CHI06GA174
- **Event ID:** 20060711X00918
- **Type:** Accident
- **Date:** 2006-06-30
- **Location:** Chicago, IL, USA
- **Coordinates:** 41.838054, -87.603332
## Injuries
- **Highest injury:** MINR
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 3
- **Uninjured:** 1
- **Total aboard:** 4
## Aircraft
- **Make:** Bell
- **Model:** UH-1H
- **Registration:** N681FD
- **FAR Part:** PUBU
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

The in-flight separation of a tail rotor driveshaft hanger bearing due to inadequate maintenance performed by maintenance personnel.  Contributing to the accident was the inability to maintain directional control due to the lack of tail rotor thrust.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=CHI06GA174) · AI Analytics · CC0 1.0*