BIRMINGHAM, AL, USA
N738NV
CESSNA 172N
THE INSTRUCTOR (CFI) REPORTED THE ENG BEGAN MISSING WHEN POWER WAS APPLIED AFTER PRACTICING STALLS. A DECISION WAS MADE TO RETURN TO THE ARPT. CARBURETOR HEAT WAS APPLIED & THE THROTTLE WAS RETARDED TO DESCEND. THE MIXTURE WAS IN FULL RICH.AFTER A COUPLE OF MINUTES, THE ENG BEGAN RUNNING ROUGH & LOSING POWER. CARBURETOR HEAT & THE THROTTLE WERE ADJUSTED IN AN UNSUCCESSFUL ATTEMPT TO RESTORE POWER. A DECISION WAS MADE TO LAND ON AN UNOPENED HIGHWAY. DURING FINAL APCH, THE ACFT STRUCK A POWER LINE. SUBSEQUENTLY, IT IMPACTED THE GROUND NOSE 1ST. APRX 10 GAL OF FUEL WAS REMAINING. ALL BUT 1 SPARK PLUG WAS FOUND OILY & SOOTY. THE ENG WAS STARTED & RAN SMOOTHLY TO 1200 RPM. IT HAD 50 HRS OF OPERATION SINCE OVERHAUL. THE PLT HANDBOOK STATED CRUISE SHOULD BE AT 65 TO 75% POWER FOR 50 HRS OR UNTIL OIL CONSUMPTION HAS BEEN STOPPED. A CHAMPION SPARK PLUG PUBLICATION STATED WET, OILY PLUGS MAY BE CAUSED BY AN ENG STILL IN A BREAK-IN PERIOD.
Source: NTSB Aviation Accident Database
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