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 CORROSION WAS FOUND ON FLOORBEAM T-CAP AT BS 1016, RBL 5, WL 208. MAINTENANCE CUT OUT DAMAGE IN FLOORBEAM T-CAP AT BS 1016, RBL 5; FABRICATED A 3 EACH REPAIR PLATES AND A FILLER; INSTALLED REPAIR PARTS IAW B737-300 SRM 51-70-12.