As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAIN CARGO COMPARTMENT FLOORBEAM UPPER CHORD HAS CORROSION ENTIRE LENGTH BS 1660 CHECKED LIMITS STA 1660 FLOORBEAM AT LBL 55 TO RBL 59. L=6.0 W = 2.0 AND D =.038, FOUND TO BE OUT OF ALLOWABLE LIMITS IAW SRM 53-00-51 . R & R STA 1660 FLOORBEAM IAW SRM 51-40-02 , FABRICATED NEW FLOORBEAM MAT TYPE BAC 1518-338 BATCH N 1922127 IAW DWG 146N5090. THIS IS A MAJOR REPAIR.