BELTON, KY, USA
N6318Q
MOONEY M20F
AFTER LEVELING AT 2500 FT, OIL FUMES WERE NOTED, BUT NO ABNORMAL INDICATIONS WERE NOTED ON THE ENGINE GAUGES. THE PILOT SUSPECTED OIL HAD BEEN SPILLED DURING A REPAIR BEFORE TAKEOFF. A SHORT TIME LATER, THE ENGINE RPM BEGAN TO INCREASE & WAS ADJUSTED BY THE PILOT. SUBSEQUENTLY, THE ENGINE FAILED. DURING A FORCED LANDING, THE PILOT WAS UNABLE TO REACH A ROAD & LANDED IN A FIELD. THE MAIN GEAR FAILED AFTER HITTING A DITCH. THE RIGHT WING WAS DAMAGED AFTER CONTACTING THE GROUND & THE LEFT WING HIT A FENCE. AN EXAMINATION REVEALED THERE WAS OIL ALONG THE LEFT SIDE OF THE FUSELAGE. A HOLE WAS FOUND IN THE ENGINE CASE BETWEEN THE NUMBER 2 & 4 CYLINDERS. THE INLET OIL LINE TO THE OIL COOLER HAD CHAFED AGAINST THE EXHAUST STACK & WAS LEAKING. IT SHOULD HAVE BEEN ROUTED UNDER A HEAT SHIELD & AWAY FROM THE EXHAUST STACK. THE OIL LINE SHOULD HAVE BEEN A STANDARD, MEDIUM PRESSURE, STRATOFLEX HOSE (MIL-H-8794D) REINFORCED WITH A FIBER BRAIDS & A STEEL BRAID. THE INSTALLED HOSE HAD A SINGLE FIBER BRAID COVERING.
Source: NTSB Aviation Accident Database
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