As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MCN - MAJOR REPAIR - DURING C-19 CHECK 2 EACH CRACKS WERE FOUND IN NR 3 SLAT LOWER SKIN BELOW AUXILIARY TRACK. MAINTENANCE CUT OUT DAMAGED AREA OF NR 3 SLAT LOWER SKIN; FABRICATED A FILLER AND SPLICE PLATE; INSTALLED REPAIR PARTS IAW B737-300 SRM 57-43-01 FIG 206.