As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAH- FLIGHT 3998 IN FLIGHT AFTER DEPARTURE A LANDING GEAR AURAL WARNING INDICATION CONTINUALLY SOUNDING. RECYCLED THE GEAR AND CONTINUED TO GET THE AURAL WARNING. RETURNED TO IAH WITHOUT INCIDENT. IAH- MAINTENANCE REMOVED AND REPLACED THE FLAP SELECTOR LEVER, PERFORMED A OPERATIONAL CHECK AND NO DEFECTS NOTED. MAINTENANCE PERFORMED A OPERATIONAL CHECK OF THE LANDING GEAR EXTENSION AND RETRACTION SYSTEM, NO DEFECTS NOTED. THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.