# NTSB Accident CEN12LA539
> **GN-1 AIRCAMPER MATHES** · 2012-08-11 · Burlington, WI, USA · MINR
## Event
- **NTSB number:** CEN12LA539
- **Event ID:** 20120814X94816
- **Type:** Accident
- **Date:** 2012-08-11
- **Location:** Burlington, WI, USA
- **Coordinates:** 42.670261, -88.270797
## Injuries
- **Highest injury:** MINR
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 2
- **Uninjured:** 0
- **Total aboard:** 2
## Aircraft
- **Make:** GN-1 AIRCAMPER
- **Model:** MATHES
- **Registration:** N31TM
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

The pilot's improper installation of the propeller bolts, which resulted in the in-flight separation of the propeller.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=CEN12LA539) · AI Analytics · CC0 1.0*