DAVISVILLE, FL, USA
N704MN
CESSNA 150M
ACFT'S ENGINE HAD OVER 200 RPM DROP ON ONE MAGNETO DURING RUNUP. PLT ATTEMPTED TO TAKEOFF WITH THE ENGINE RUNNING ROUGH. AFTER LIFTOFF THE ENGINE BEGAN TO BACKFIRE AND LOSE POWER. THE PLT STATED HE THEN APPLIED CARBURETOR HEAT AND PUMPED THE ENGINE PRIMER. SHORTLY AFTER THIS THE ENGINE QUIT COMPLETELY. WITNESSES STATED THAT SHORTLY AFTER THE ENGINE BEGAN TO BACKFIRE AND LOSE POWER IT BEGAN TO PUFF HEAVY BLACK SMOKE. SHORTLY AFTER THIS THE ENGINE QUIT COMPLETELY. THE CAUSE FOR THE ROUGH RUNNING ENGINE AND INITIAL LOSS OF POWER COULD NOT BE FOUND AFTER THE ACCIDENT. THE AIRCRAFT WAS BEING OPERATED ON AUTOGAS AND THE AIRCRAFT'S LOGBOOK SHOWED NO INDICATION THAT AN STC HAD BEEN COMPLIED WITH ALLOWING USE OF AUTOGAS. THE ACFT NOSED OVER DURING THE FORCED LNDG.
Source: NTSB Aviation Accident Database
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