AVA, MO, USA
N80751
CESSNA 172
THE PLT REPORTS THAT THE ENG BEGAN TO RUN ROUGH AND LOSE RPM WHILE THE ACFT WAS CRUISING AT 2500 FT. HE SAID HE ATTEMPTED EMERG PROC BUT THE LOSS OF RPM CONTINUED AND HE DECIDED ON AN OFF-ARPT LANDING. DURING THE APCH TO THE LANDING AREA THE ENG RPM DROPPED TO 1200 AND THE PLT SECURED THE ENG. DURING THE FORCED LANDING THE ACFT HIT A SMALL TREE AND A FENCE POST. EXAM OF THE ENG REVEALED A BROKEN EXHAUST VALVE IN THE #1 CYL. METALLURGICAL EXAM OF THE BROKEN VALVE REVEALED EVIDENCE OF A PROGRESSIVE FAILURE.
Source: NTSB Aviation Accident Database
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