As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MCN - MAJOR REPAIR - DURING C-18 CHECK A .75 INCH CRACK WAS FOUND IN THE UPPER FLANGE OF LONGITUDINAL FLOORBEAM AT RBL 45 APPROXIMATELY 2 INCHES FROM BS 727B, WL 208.1. MAINTENANCE CUT OUT CRACK IN UPPER FLANGE OF LONGITUDINAL FLOORBEAM RBL 45 AND PERFORMED HFEC INSPECTION TO VERIFY NO CRACKS EXIST. FABRICATED A NEW TIE STRAP AND SHIM, AND INSTALLED REPAIR PARTS IAW AWA ER 15-5702-02234-TB5.