As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIR TURNBACK DUE TO A FLAP OVERSPEED WARNING FOLLOWED BY A FAILED ATTEMPT TO CYCLE THE FLAP HANDLE FROM THE 15 DEGREE POSITION. AIRCRAFT LANDED WITHOUT FURTHER INCIDENT, NO EMERGENCY DECLARED. MAINTENANCE REPLACED THE FLAP CONTROL SWITCH. OPS CHECKED GOOD.