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Fort Collins, CO
THE PRIVATE PLT WAS PERFORMING A NIGHT SOLO TRAINING FLIGHT IN THE LOCAL AREA. AFTER SEVERAL STOP AND GO LANDINGS, THE PLT WAS RETURNING TO HER HOME AIRPORT. AT 6300FT MSL, IN CRUISE FLIGHT, THE PLT REPORTED THAT THE ENGINE QUIT. ATTEMPTS TO RESTART WERE NOT SUCCESSFUL. A FORCED LANDING WAS PERFORMED ON A PLOWED FIELD. AT TOUCHDOWN, THE NOSE GEAR DUG INTO THE SOFT TERRAIN, COLLAPSED, AND THE AIRCRAFT NOSED OVER. A POST ACCIDENT ENGINE INSPECTION REVEALED NO EVIDENCE TO EXPLAIN THE REPORTED ENGINE FAILURE. DURING A POST ACCIDENT ENGINE RUN, THE ENGINE OPERATED TO 2200 RPM WITHOUT ANY PROBLEMS BEING NOTED. AFTER FOUR ENGINE RUNS, SOME DEBRIS WAS REMOVED FROM THE CARBURETOR, AND THE BOTTOM FOUR PLUGS SHOWED SOME LEADING.
THE PRIVATE PLT WAS PERFORMING A NIGHT SOLO TRAINING FLIGHT IN THE LOCAL AREA. AFTER SEVERAL STOP AND GO LANDINGS, THE PLT WAS RETURNING TO HER HOME AIRPORT. AT 6300FT MSL, IN CRUISE FLIGHT, THE PLT REPORTED THAT THE ENGINE QUIT. ATTEMPTS TO RESTART WERE NOT SUCCESSFUL. A FORCED LANDING WAS PERFORMED ON A PLOWED FIELD. AT TOUCHDOWN, THE NOSE GEAR DUG INTO THE SOFT TERRAIN, COLLAPSED, AND THE AIRCRAFT NOSED OVER. A POST ACCIDENT ENGINE INSPECTION REVEALED NO EVIDENCE TO EXPLAIN THE REPORTED ENGINE FAILURE. DURING A POST ACCIDENT ENGINE RUN, THE ENGINE OPERATED TO 2200 RPM WITHOUT ANY PROBLEMS BEING NOTED. AFTER FOUR ENGINE RUNS, SOME DEBRIS WAS REMOVED FROM THE CARBURETOR, AND THE BOTTOM FOUR PLUGS SHOWED SOME LEADING.