As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAIN CABIN MID FLOORBEAM INBD AND RBL 64, BS 1018 HAS CORROSION ON UPPER SURFACE. REMOVED THE CORROSION AND FOUND FOUND OUT OF LIMITS IAW SRM 53-40-13, ALLOWABLE DAMAGE 1, FIG 101. FABRICATED AND INSTALLED A REPLACEMENT FLOORBEAM IAW SRM 51-40-02, AND DWG 144N5140.