As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAH- DURING "C" CHECK THE LEFT FLOOR BEAM WAS CORRODED AT FR. 59 TO 61. IAH- MAINTENANCE REMOVED THE CORROSION BETWEEN FRAMES 59 to 61, DRILLED OUT THE CORRODED AREA AND INSTALLED #5 RIVET, TREATED PRIMED AND PAINTED THE AREA, AND. THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE AFTER RELEASE FROM "C" CHECK.