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 PITTING CORROSION WAS FOUND ON THE L/H WING LOWER SKIN AT THE #2 TRAILING EDGE FLAP TRACK ATTACH POINT WS 254 L/H. MAINTENANCE PREPARED AREA AT L/H WING LOWER SKIN FLAP TRACK ATTACH POINT WS 254 L/H; REMOVED CORROSION; TREATED AREA; FABRICATED A TAPERED SHIM; AND INSTALLED REPAIR PART IAW AWA E.R. 15-5724-02294-TB2.