As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE UPPER CAP OF THE FS 1681 FLOOR BEAM WAS FOUND WITH NUMEROUS AREAS OF CORROSION ALONG ITS LENGTH. THE UPPER CAP WAS TRIMMED OFF ALONT ITS FULL LENGTH FROM LBL 60 TO RBL 60. A NEW CAP WAS FABRICATED FROM AN ALUMINUM EXTRUSION AND INSTALLED PER ER/A 380020-14, REV A.