As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAH - FLIGHT 2605 - THE CREW REPORTED A LANDING GEAR DISAGREE ON CLIMBOUT AND THE GEAR WOULD NOT RETRACT. THE AIRCRAFT RETURNED TO IAH WHERE IT LANDED WITHOUT INCIDENT. MAINTENANCE REMOVED AND REPLACED THE LANDING GEAR ELECTRONIC UNIT, (LGEU), OPERATIONALLY TESTED WITH NO DEFECTS, AND TEST FLOWN SATISFACTORILY. THE AIRCRAFT WAS SUBSEQUENTLY APPROVED FOR RETURN TO SERVICE.