As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
YVR - MAJOR REPAIR - "C" - DURING C-13 CHECK CORROSION WAS FOUND ON UPPER SURFACE OF FLOOR SUPPORT AT BS 967, RBL 20. MAINTENANCE REMOVED CORROSION AND FOUND MATERIAL LOSS OUT OF LIMITS. REMOVED DAMAGED PORTION OF SUPPORT AT BS 967, RBL 20; FABRICATED NEW FLOOR SUPPORT AND INSTALLED REPAIR IAW B737-300 SRM 51-70-12 FIG. 1, PG.1.