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 IN 5 PLACE ON UPPER SURFACE OF FLOORBEAM AT BS 328, BETWEEN RBL 18 AND RBL 50. MAINTENANCE CUT OUT AND REMOVED DAMAGED SECTION OF FLOORBEAM AT BS 328, BETWEEN RBL 18 AND RBL 50; FABRICATED A NEW REPLACEMENT SECTION OF FLOORBEAM AND 2 EACH REPAIR ANGLES & STRAPS; INSTALLED REPAIR PARTS IAW B737-300 SRM 53-00-51 FIG 201, PG 201-205.