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-15 CHECK 2 EACH CRACKS WERE FOUND IN NR 3 SLAT LOWER SKIN BELOW THE ACTUATOR AT SS 68.26. MAINTENANCE CUT OUT CRACKED SLAT SKIN AT SS 68.26 AND PERFORMED A HFEC INSPECTION OF CUTOUT TO VERIFY NO CRACKS EXIST; FABRICATED A FILLER AND SPLICE PLATE; INSTALLED REPAIR PARTS IAW B737-300 SRM 57-43-01 FIG 206 PG 216-219.