As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION ON THE AFT CARGO FLOOR SUPPORT BETWEEN BS 1500 - 1520, RBL 2.9. ON THE INBD SIDE OF WEB AND ON ONE STIFFENER ON THE OTBD SIDE. REMOVED CORROSION AND FOUND TO BE OUT OF LIMITS IAW SRM. FABRICATED A REPAIR AND INSTALLED IAW SRM.