As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
OKC - FLIGHT 2204, THE CREW REPORTED A LANDING GEAR DISAGREE MESSAGE AND THE GEAR WOULD NOT RETRACT. THE AIRCRAFT RETURNED TO OKC WHERE IT LANDED WITHOUT INCIDENT. THE AIRCRAFT WAS FERRIED TO IAH WHERE MAINTENANCE REMOVED AND REPLACED THE RIGHT DOWN LOCK PROXIMITY SWITCH, OPERATIONALLY TESTED WITH NO DEFECTS, AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.