WATERTOWN, WI, USA
N3691H
MOONEY M20K
FOLLOWING AN ENGINE POWER LOSS DUE TO FATIGUE OF THE #1 CYLINDER, THE PLT FORCE LANDED THE ACFT ON A HIGHWAY. THE HIGHWAY WAS THE ONLY AVAILABLE LANDING AREA, ACCORDING TO THE PLT. ON LANDING ROLLOUT, THE PLT WAS FORCED TO SWERVE THE ACFT OFF THE PAVED SURFACE TO AVOID ON COMING VEHICULAR TRAFFIC. THE ACFT STRUCK TWO TRAFFIC SIGNS AND SUBSEQUENTLY WENT INTO A DITCH ALONG THE SIDE OF THE ROAD. ALTHOUGH THE SYLINDER APPEARED TO HAVE BEEN PROPERLY MANUFACTURED, ACCORDING TO TELEDYNE CONTINENTAL METALLURGICAL DATA THE ISOLATED LOCATION OF THE FATIGUE POINTS AND THE ABSENCE OF OTHER POSSIBLE CAUSES OF THE CYLINDER FAILURE INDICATE THAT A MANUFACTURING DEFECT EXISTED.
Source: NTSB Aviation Accident Database
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