As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION ON MAIN CABIN FLOORBEAM UPPER CAP AT BS 377.7 THRU FASTENER HOLES (2 EA.) AT RBL 1 AND 5 (ON TOP SIDE). CUT OUT UPPER CAP AT BS 377.7. FABRICATED AND INSTALLED FLOORBEAM REPAIR 102.5" BY 7" FROM BAC1505-100617 IAW B757 SRM 53-10-51D, 51-40-05 AND 51-20-01.