As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
REFERENCE NON ROUTINE C050515. DURING C3 C-CHECK INSPECTION NOTED FLOOR PANEL 261FF HAS CORROSION ON LOWER SURFACE. MX R&R FLOOR PANEL IN ACCORDANCE WITH THE REQUIREMENTS OF A319 AMM 53-42-12 PB 401. UPON COMPLETION OF THE REPAIR, IT WAS INSPECTED AND FOUND ACCEPTABLE.