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 FLOOR SUPPORT AT BS 961, RBL 25. MAINTENANCE REMOVED CORRODED FLOOR SUPPORT AT BS 961, RBL 25; FABRICATED A T-ANGLE AND FILLERS; INSTALLED REPAIR PARTS IAW B737-300 SRM 51-40-02 FIG 12, PG 1 & 45.