As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
YVR - MAJOR REPAIR - DURING C-03 CHECK A .5 INCH CRACK WAS FOUND ON FLOORBEAM LINK ATTACH U CHANNEL AT BS 520, BL 0. MAINTENANCE REMOVED DAMAGED LINK ATTACH CHANNEL. FABRICATED A NEW REPLACEMENT LINK ATTACH CHANNEL, INSTALLED REPAIR PART IAW DWG 66-23250, B737-300 SRM 51-10-02, AND SRM 51-40-02.