ASN Wikibase Occurrence # 177181
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| Date: | Sunday 21 June 2015 |
| Time: | 11:30 |
| Type: |  Mooney M20K 231 |
| Owner/operator: | Private |
| Registration: | N1168Z |
| MSN: | 25-0697 |
| Year of manufacture: | 1982 |
| Engine model: | Continental TSIO-520-MB |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Town of Wilson, south of Sheboygan, WI -
 United States of America
|
| Phase: | En route |
| Nature: | Private |
| Departure airport: | Sheboygan, WI (KSBM) |
| Elkhart, IN (KEKM) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
Shortly after takeoff, the pilot advised air traffic control that he was returning to the airport due to low oil pressure. The engine subsequently lost power, and the pilot was forced to land in a wheat field 5 miles south of the airport. During on-site examination of the airplane, no oil was found in the crankcase, and subsequent examination of the engine and turbocharger revealed that the turbocharger was dry. Further examination of the engine revealed evidence of preignition in the No. 5 cylinder that appeared to have been caused by 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.
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.
Accident investigation:
 |
|
Sources:
NTSB
https://flightaware.com/live/flight/N1168Z
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 22-Jun-2015 02:18 | Geno | Added |
| 22-Jun-2015 16:22 | Geno | Updated [Aircraft type, Registration, Cn, Operator, Departure airport, Destination airport, Source, Narrative] |
| 30-Jun-2015 00:57 | Geno | Updated [Nature, Destination airport, Source] |
| 21-Dec-2016 19:30 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 01-Dec-2017 13:42 | ASN Update Bot | Updated [Operator, Other fatalities, Departure airport, Destination airport, Source, Narrative] |
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