# NTSB Accident SEA89FA111
> **OREGON HELICOPTERS UH-1L** · 1989-06-14 · BARING, WA, USA · SERS
## Event
- **NTSB number:** SEA89FA111
- **Event ID:** 20001213X28663
- **Type:** Accident
- **Date:** 1989-06-14
- **Location:** BARING, WA, USA
- **Coordinates:** 47.729724, -121.490196
## Injuries
- **Highest injury:** SERS
- **Fatal:** 0
- **Serious:** 1
- **Minor:** 1
- **Uninjured:** 0
- **Total aboard:** 2
## Aircraft
- **Make:** OREGON HELICOPTERS
- **Model:** UH-1L
- **Registration:** N157LC
- **FAR Part:** 133
- **Engines:** 1
- **Damage:** DEST
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

FATIGUE FAILURE OF THE TAIL ROTOR 42 DEGREE GEAR BOX DUE TO PILOT INDUCED OVERSTRESS. NAVY DATA AND FAA TYPE CERTIFICATE LIMITATIONS WERE NOT ADHERED TO.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=SEA89FA111) · AI Analytics · CC0 1.0*