As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAH- DURING A OPERATIONAL CHECK OF THE LANDING GEAR SYSTEM THE MECHANIC NOTED THAT THE RIGHT HAND MLG WAS NOT SHOWING THE CORRECT INDICATION UPON RETRACTION. MAINTENANCE REMOVED AND REPLACED THE RIGHT HAND MLG UPLOCK BOX, PERFORMED A OPERATIONAL CHECK OF THE LANDING GEAR SYSTEM, NO DEFECTS NOTED. THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.