As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAH - FLIGHT 3423, THE CREW REPORTED THAT THE LANDING GEAR DOORS WILL NOT CLOSE. THE AIRCRAFT LANDED AT IAH WITHOUT INCIDENT WHERE MAINTENANCE REMOVED AND REPLACED THE GEAR DOOR SOLENOID VALVE, AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.