As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION IN THE MAIN CABIN FLOOR STRUCTURE RT CREASE BEAM SUPPORT INTERCOSTAL LOWER SURFACE BS 1615 (VIEW FROM AFT CARGO CEILING AREA). REMOVED CORR ON RT CREASE BEAM SUPPORT INTERCOSTAL STA 1615 IAW SRM 51-10-02. ORIG MAT .050 REM .044 LOSS .006 FOUND TO BE OUT OF LIMITS IAW SRM 53-60-13-1A. REMOVED, FABRICATED AND INSTALLED NEW INTERCOSTAL (WEB) IAW DWG 146N8722 REV F & BK.