As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAH - FLIGHT 3745, THE CREW REPORTED A LANDING GEAR AURAL WARNING IN FLIGHT. THE AIRCRAFT RETURNED TO IAH WHERE IT LANDED WITHOUT INCIDENT. MAINTENANCE INSPECTED THE AIRCRAFT AND CLEANED THE FLAP CONTROL LEVER. THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE AFTER SATISFACTORY COMPLETION OF OPERATIONAL CHECKS.