As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON APPROACH AILERONS WERE BINDING WHEN DEFLECTED RIGHT OR LEFT. FOUND SCREW TRAPPED BETWEEN INNER AILERON AND WING SURFACE, INNER ROOT OF LEFT AILERON. REMOVED SCREW, INSPECTED AFFECTED AREA, NO DAMAGE FOUND. FUNCTIONAL CHECK OF AILERON TRAVEL OK ON GROUND. EXAMINED ENTIRE WING AREA NO EVIDENCE OF MISSING SCREW.