As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLB-OUT EWR PILOT NOTED AILERONS FELT VERY STIFF. AILERON REPONSE WAS NORMAL. FLIGHT RETURNED TO EWR. PILOT REPORTED AILERON FELT NORMAL ON APPROACH TO EWR. MTC INSPECTED AILERON SYSTEM WITH NO OBVIOUS DEFECTS NOTED. LUBRICATED AIL ERON MECHANISM IN MAIN WHEEL WELL. FLT CONTROL CHECK NORMAL.