As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE A/C WAS IN FOR HEAVY CHECK FOUND RT WING FIXED LEADING EDGE SKIN CRACK FOUND ON SLAT TRACK NR 4. REPAIRED SLAT TRACK NR 4, IAW SRM 57-49-01 R6. SEE AAR NRC NR 4500797-6000-0013 FOR WORK PERFORMED. A/C REMAINS IN YQG FOR COMPLETION.