What was found
IAH - FLIGHT 2953, ON CLIMBOUT THE CREW REPORTED THAT THE LANDING GEAR WOULD NOT RETRACT. THE CREW FOLLOWED THE QRH, CYCLED THE GEAR AND THE GEAR RETRACTED. THE AIRCRAFT LANDED AT IAH WITHOUT INCIDENT. MAINTENANCE REMOVED AND REPLACED THE LGEU, OPERATIONALLY TESTED WITH NO DEFECTS, AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.