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-16 CHECK A CRACK WAS FOUND IN THE L/H STRINGER 18A SHEAR BEAM (WEB) AT ATTACHMENT TO STA 727 BULKHEAD. MAINTENANCE REMOVED CRACKED WEB AT BS 727, STR 18A L/H; FABRICATED A NEW WEB AND INSTALLED REPAIR IAW B737-300 SRM 51-10-02, PG. 12.