As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING C-12 CHECK A 3 INCH CRACK WAS FOUND ON RT WING UPPER LEADING EDGE SKIN AT NR 8 SLAT INBOARD CORNER. MAINTENANCE REMOVED CRACKED RT WING UPPER LEADING EDGE SKIN PANEL FROM WS 425.50 TO WS 471.30; FABRICATED 3 EACH REPAIR STRAPS & FILLERS; INSTALLED REPAIR PARTS IAW AWA ER 19-5700-00012-DD5.