# NTSB Accident CEN20LA073
> **Hiller UH 12E** · 2020-02-01 · Dinosaur, CO, USA · NONE
## Event
- **NTSB number:** CEN20LA073
- **Event ID:** 20200202X81855
- **Type:** Accident
- **Date:** 2020-02-01
- **Location:** Dinosaur, CO, USA
- **Coordinates:** 40.462223, -108.919998
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 3
- **Total aboard:** 3
## Aircraft
- **Make:** Hiller
- **Model:** UH 12E
- **Registration:** N7173S
- **FAR Part:** 135
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

Failure of a S4 compressor blade due to a fatigue crack that likely initiated at a corrosion pit. Contributing to the accident was maintenance personnel’s failure to detect the corrosion pits during maintenance.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=CEN20LA073) · AI Analytics · CC0 1.0*