As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER LANDING PILOTS TRIED TO RETRACT THE FLAPS BUT COULD NOT GET THEM TO MOVE. AIRCRAFT WAS INSPECTED AND FLAP UP RELAY WAS FOUND TO HAVE FAILED, P/N 974.20.01.902. RELAY WAS REPLACED AND FLAP SYSTEM TESTED. AIRCRAFT RETURNED TO FLIGHT LINE.