As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAH - DURING FLIGHT 3778, CREW REPORTED THE LEFT HAND MAIN LANDING GEAR WAS SLOW TO RETRACT. THE AIRCRAFT LANDED AT IAH WITHOUT INCIDENT WHERE MAINTENANCE REMOVED AND REPLACED THE LEFT MAIN LANDING GEAR RETRACT ACTUATOR, AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE. (X)