# NTSB Accident CEN15LA279
> **MOONEY M20K** · 2015-06-21 · Sheboygan, WI, USA · NONE
## Event
- **NTSB number:** CEN15LA279
- **Event ID:** 20150622X70018
- **Type:** Accident
- **Date:** 2015-06-21
- **Location:** Sheboygan, WI, USA
- **Coordinates:** 43.769721, -87.851669
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 1
- **Total aboard:** 1
## Aircraft
- **Make:** MOONEY
- **Model:** M20K
- **Registration:** N1168Z
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** IMC
## Probable cause

Oil starvation due to preignition in the No. 5 cylinder as a result of failed spark plugs; the top and sides of the piston head were eroded, which allowed the exhaust gases caused by the preignition to pressurize the crankcase and force engine oil out of the breather tube.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=CEN15LA279) · AI Analytics · CC0 1.0*