As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB THE CREW REPORTED THAT THE LANDING GEAR DISAGREE WARNING ILLUMINATED WHEN THE GEAR WAS RETRACTED. THE AIRCRAFT RETURNED TO IAH AND LANDED WITHOUT INCIDENT. MAINTENANCE PERFORMED LANDING GEAR OPERATIONAL TESTS AND COULD NOT DUPLICATE THE DISCREPANCY. THE DISCREPANCY WAS CLEARED AND THE AIRCRAFT WAS RETURNED TO SERVICE.