As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPPER FUSELAGE PAX CABIN OVER FLOOR LEVEL, FROM STA 7087/FR16 TO STA 8077/FR20 BETWEEN -Y203 AND -Y1219, FLOOR PANEL 222EF WITH CORROSION AT SEVERAL PACES. DAMAGED FLOOR PANEL WAS REPLACED IAW SRM REQUIREMENTS, UNDER THE NON ROUTINE ITEM.