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-11 CHECK 3 EACH 1" CRACKS WERE FOUND ALONG RIVETS ON LOWER EDGE OF THE NO. 6 LEADING EDGE SLAT AT THE INBOARD AUXILIARY TRACK. MAINTENANCE REMOVED EXISTING EXTERNAL DOUBLER; CUTOUT FOUR DAMAGED FASTENER HOLES; FABRICATED A FILLER AND DOUBLER; INSTALLED REPAIR PARTS IAW B737-300 SRM 57-43-01, PG. 216, FIG. 206.