As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT TOOK OFF IN AIRCRAFT, TURNED DOWNWIND AND ENGINE STARTED RUNNING ROUGH AND LOSING POWER. PILOT LANDED AC AND ENGINE QUIT AS HE PULLED OFF RUNWAY. ALL SYSTEMS CHECKED POINTED TO INSTALLED NEW REBUILT CARBURETOR AND ENGINE FUNCTIONED NORMALLY. PROBABLE CAUSE FLOAT STICKING IN CARBURETOR. RECOMMENDATIONS TO PREVENT RECURRENCE. CARBURETOR RETURNED TO MFG FOR EVALUATION.