As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
COCKPIT INT AFTER REMOVAL FLOOR PANEL WITH OAN J/C MD10-0600C210-1JR FOUND SEVERE CORROSION ON 2 HORIZ MEMBRANE: FROM STA 303 TO STA 330 FROM X= 7.50 TO X=17 LT SIDE; FROM STA 303 TO STA 330 FROM X= 27 TO X= 60 LT SIDE. THE FIRST CASE REPLACED MEMBRANE IAW SRM 51-35-01 PAR 1-5 VOL II. THE SECOND CASE REPAIRED MEMBRANE IAW SRM 53-00-01 FIG 10 VOL I.