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-18 CHECK FOUND THE UPPER SURFACE OF THE NR 4 SLAT DELAMINATED AT THE INBOARD CORNER BETWEEN WS 521.30 AND WS 531.25. MAINTENANCE CUTOUT DAMAGED SKIN ON UPPER SURFACE OF NR 4 SLAT; FABRICATED AN INTERNAL & EXTERNAL DOUBLER; INSTALLED REPAIR PARTS IAW ER 03-5741-04358-ES3.