What was found
CARBURETOR FLOAT FULCRUM SCREW VIBRATED LOOSE CAUSING FLOAT TO STICK. AIRCRAFT ENGINE BEGAN RUNNING ROUGH. AIRCRAFT SUCCESSFULLY RETURNED TO FIELD. FULCRUM SCREW BRASS THREADS WERE FOUND WORN CAUSING SCREW3 TO COME LOOSE. AIRCRAFT WAS NEW ON 12-6-96 AND NO RECORD OF PREVIOUS MAINTENANCE WAS FOUND IN RECORDS. SUBMITTER SUSPECTED SCREW WAS NOT PROPERLY INSTALLED AT MANUFACTURER, SUGGESTED AN AD OR SA1B BE ISSUED TO INSPECT FULCRUM SCREW FOR A PROPER INSTALLATION. (X)