# NTSB Accident SEA91LA012
> **Christen Industries A-1** · 1990-11-04 · AFTON, WY, USA · NONE
## Event
- **NTSB number:** SEA91LA012
- **Event ID:** 20001212X24699
- **Type:** Accident
- **Date:** 1990-11-04
- **Location:** AFTON, WY, USA
- **Coordinates:** 42.720329, -110.920501
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 1
- **Total aboard:** 1
## Aircraft
- **Make:** Christen Industries
- **Model:** A-1
- **Registration:** N9609G
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

AN IMPROPER MAINTENANCE MODIFICATION TO DISABLE THE CARBURETOR HEAT CONTROL BY UNKNOWN PERSONNEL.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=SEA91LA012) · AI Analytics · CC0 1.0*