# NTSB Accident ATL90LA035
> **WACO HRE** · 1989-12-06 · ALEXANDER CITY, AL, USA · SERS
## Event
- **NTSB number:** ATL90LA035
- **Event ID:** 20001213X29906
- **Type:** Accident
- **Date:** 1989-12-06
- **Location:** ALEXANDER CITY, AL, USA
- **Coordinates:** 32.919532, -85.929519
## Injuries
- **Highest injury:** SERS
- **Fatal:** 0
- **Serious:** 1
- **Minor:** 1
- **Uninjured:** 0
- **Total aboard:** 2
## Aircraft
- **Make:** WACO
- **Model:** HRE
- **Registration:** N31654
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

AN ENGINE FAILURE DUE TO SEPARATION OF THE MAGNETO AS A RESULT OF A BROKEN MOUNTING STUD. THE MOUNTING STUD MOST LIKELY FAILED DUE TO VIBRATIONS INDUCED BY AN INADEQUATELY BALANCED CRANKSHAFT.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=ATL90LA035) · AI Analytics · CC0 1.0*