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 CRACKS WERE FOUND ON NR 3 SLAT LOWER SKIN BELOW ACTUATOR AT WBL 234.4. MAINTENANCE CUTOUT DAMAGE ON NR 3 SLAT LOWER SKIN WBL 234.4; FABRICATED A FILLER AND DOUBLER PER DWG 65C26603; INSTALLED REPAIR PARTS IAW 57-43-01 FIG 206, PG 216-219.