As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAH - FLIGHT 2830, THE CREW REPORTED AN AIR/GROUND FAIL IN FLIGHT AND THE LANDING 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 CHECKED WITH NO DEFECTS, ALL IAW EMB-145 AMM 32-32-01 AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.