# NTSB Accident SEA90FA030
> **CRAWFORD-GORDON THORP T-18** · 1989-12-16 · AUSTIN, NV, USA · FATL
## Event
- **NTSB number:** SEA90FA030
- **Event ID:** 20001213X30013
- **Type:** Accident
- **Date:** 1989-12-16
- **Location:** AUSTIN, NV, USA
- **Coordinates:** 39.540744, -117.18946
## Injuries
- **Highest injury:** FATL
- **Fatal:** 1
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 0
- **Total aboard:** 1
## Aircraft
- **Make:** CRAWFORD-GORDON
- **Model:** THORP T-18
- **Registration:** N111GC
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** DEST
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

AN IMPROPER MAJOR ALTERATION PERFORMED BY THE PILOT. AS A RESULT OF THIS MODIFICATION, THE PROPELLER FAILED IN FLIGHT.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=SEA90FA030) · AI Analytics · CC0 1.0*