As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLIGHT, ENGINE BEGAN RUNNING VERY ROUGH. THE PILOT LANDED AT NEAREST AIRPORT. UPON INSPECTION, FOUND LINE GOING FROM THE SPIDER TO THE NR 3 CYLINDER FUEL NOZZLE HAD BROKEN. THIS BREAK OCCURRED UNDER THE B-NUT NEXT TO THE BALL AT THE END OF THE LINE WHERE IT CONNECTS TO THE FUEL NOZZLE. THE NUT WAS TIGHT AND CONNECTED PROPERLY. FUEL LINE REPLACED WITH NEW.