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-14 CHECK FOUND THE NR 4 SLAT WEDGE DELAMINATED ON LOWER SURFACE AT INBOARD END, SLAT STA 14. MAINTENANCE REMOVED DELAMINATED AREA OF NR 4 SLAT FROM SLAT STA 12.25 TO 15.25 RT; FABRICATED A FILLER AND DOUBLER; BONDED REPAIR PARTS TO SLAT IAW B737-300 SRM 51-70-10 FIG 30.