As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING A C-CHECK, THE MAINFRAME AT FS 473.15 AT THE FLOOR LEVEL UNDER THE LT AND RT OVERWING EXITS WERE FOUND TO BE CORRODED BEYOND LIMITS. MAINTENANCE IS REPAIRING THE MAINFRAME AT FS 473.15 AT THE FLOOR LEVEL UNDER THE LT AND RT OVERWING EXITS IAW EO. (K)