As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAH - FLIGHT 2257, DURING TAKEOFF THE CREW REPORTED THAT THE FLIGHT CONTROLS FELT AS THOUGH THEY WERE POPPING AND CATCHING WHEN MOVED LEFT OR RIGHT OF CENTER. THE AIRCRAFT RETURNED TO IAH WHERE IT LANDED WITHOUT INCIDENT. MAINTENANCE INSPECTED THE AIRCRAFT, OPERATIONALLY TESTED THE FLIGHT CONTROLS ALL WITH NO DEFECTS NOTED. AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.