As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
REFERENCE NON ROUTINE CO51223. DURING C3 C CHECK INSPECTION NOTED FLOOR PANEL 261FF HAD CORROSION ON UPPER AND LOWER SURFACES. MX REMOVED FLOOR PANEL AND INSTALLED NEW IN ACCORDANCE WITH THE REQUIREMENTS OF A319 AMM 53-42-12-400-002. UPON COMPLETION OF THE REPAIR, IT WAS INSPECTED AND FOUND ACCEPTABLE.