As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
***WHILE A/C WAS OUT OF SERVICE FOR A HEAVY CHECK*** LH WING FIXED LE SKIN CRACKED AT SLAT TRACK #4 CUTOUT. CRACK REMOVED IAW SRM 51-10-03, FOUND TO BE WITHIN LIMITS IAW SRM 57-49-01 REPAIR 6. A/C REMAINS OUT OF SERVICE FOR HEAVY CHECK COMPLETION.