As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING C4 S1 C CHECK INSPECTION NOTED AFT CARGO PIT CENTER FLOORBEAM BETWEEN C58 AND C59 NUT PLATES HAVE SIGNS OF CORROSION. MAINTENANCE REMOVED OLD FLOORBEAM AND REPAIR ANGLES, FABRICATED NEW FLOORBEAM AND REPAIR ANGLES IN ACCORDANCE WITH THE REQUIREMENTS OF EA A9-53R-30229 AND INSTALLED NEW PARTS IN ACCORDANCE WITH THE REQUIREMENTS OF SRM 51-42-11. UPON COMPLETION OF THE REPAIR IT WAS INSPECTED AND FOUND ACCEPTABLE.