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-20 CHECK A CRACK WAS FOUND COMING FROM A RIVET HOLE ON STRINGER 15 L/H, FS 540. MAINTENANCE CUT OUT CRACKED SECTION OF STRINGER 15 L/H, FS 540, FORWARD OF AFT END; FABRICATED A REPAIR SPLICE AND INSTALLED REPAIR IAW AWA ER 15-5361-02113-TB3.