As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAH- DURING "C" CHECK INSPECTION IT WAS NOTED THAT THE RIGHT CREASE BEAM BETWEEN FRAME 18 and 20 WAS CORRODED AROUND THE NUT PLATES. IAH- MAINTENANCE REMOVED AND REPLACED THE CREASE BEAM, AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE, WHEN RELEASED FROM "C" CHECK.