YORKTOWN, VA, USA
N567MM
MOONEY M-20J
THE PLT WAS RETURNING TO THE ARPT AFTER A 20 MINUTE LOCAL FLIGHT. ABOUT 5 MILES FROM THE ARPT HE NOTICED THE OIL PRES/TEMP GAGES INDICATED ZERO EVEN AFTER HE CHECKED THE CIRCUIT BREAKERS-SHORTLY AFTERWARD THE ENGINE BEGAN TO LOSE POWER AND VIBRATE SEVERELY. THE PLT SHUT THE ENG DOWN AND LANDED IN A FIELD. EXAMINATION OF THE ACFT REVEALED THERE WAS OIL LEAKAGE THROUGH A SPLIT IN THE OIL GASKET LOCATED BETWEEN THE OIL FILTER CONVERTER PLATE AND ITS MOUNTING FLANGE. THERE WAS FAILURE OF THE CYL NO. 4 CONNECTING ROD BEARING BECAUSE OF THE LACK OF LUBRICATION.
Source: NTSB Aviation Accident Database
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