What was found
IAH - FLIGHT 2102, THE CREW REPORTED A LANDING GEAR LEVER DISAGREE AND THE LANDING GEAR WOULD NOT RETRACT. THE AIRCRAFT RETURNED TO IAH WHERE IT LANDED WITHOUT INCIDENT. MAINTENANCE REMOVED AND REPLACED THE LANDING GEAR LEVER, AND LANDING GEAR ELECTRONICS UNIT, LGEU, TEST FLEW SATISFACTORILY, AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.