ROSEAU, MN, USA
N9070K
STINSON 108-1
THE PLT INTENTIONALLY GROUND LOOPED THE ACFT DURING A FORCED LANDING TO AVOID OBSTACLES FOLLOWING A LOSS OF POWER EN ROUTE. APRX 1 1/2 HRS INTO THE FLT THE PLT NOTICED AN ENGINE ROUGHNESS FOLLOWED BY AN INCREASE IN OIL TEMP WHICH RETURNED TO NORMAL SHORTLY THEREAFTER. ABOUT 1 HR LATER, A 25 RPM DECREASE AND ENGINE ROUGHNESS WAS EXPERIENCED. A CONTINUED DECREASE IN RPM WAS EXPERIENCED THROUGHOUT THE NEXT 1/2 HR AND THE PLT LEANED THE MIXTURE AND TURNED THE CARB HEAT ON AND OFF IN AN ATTEMPT TO REGAIN POWER. A TOTAL LOSS OF POWER WAS THEN EXPERIENCED AND THE FORCED LANDING WAS INITIATED. AN ICING PROBABILITY CHART INDICATES THE EXISTING TEMP (70 DEGS F) AND THE DEW POINT (55 DEGS F) WHERE CONDUCIVE TO CARB ICE. NO MECHANICAL FAILURE/MALFUNCTION WAS FOUND.
Source: NTSB Aviation Accident Database
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