# NTSB Accident WPR17LA002
> **Tamarack Helicopters Inc UH-1H** · 2016-10-05 · Gila Bend, AZ, USA · MINR
## Event
- **NTSB number:** WPR17LA002
- **Event ID:** 20161005X45137
- **Type:** Accident
- **Date:** 2016-10-05
- **Location:** Gila Bend, AZ, USA
- **Coordinates:** 32.975555, -112.728614
## Injuries
- **Highest injury:** MINR
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 1
- **Uninjured:** 0
- **Total aboard:** 1
## Aircraft
- **Make:** Tamarack Helicopters Inc
- **Model:** UH-1H
- **Registration:** N175SF
- **FAR Part:** 137
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

The separation of the 90° tail rotor gearbox assembly as a result of fatigue to the tail rotor gearbox input quill assembly attachment studs due to the helicopter experiencing highly repetitive agricultural flight profiles for which it was not designed.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=WPR17LA002) · AI Analytics · CC0 1.0*