As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE IN DALFORT FOR C-CHECK, MAINTENANCE FOUND A CRACK IN THE AFT END OF THE UPPER LEADING EDGE RIB ON THE LEFT HAND WING LEADING EDGE AT STATION XFS 596.0. MAINTENANCE STOP DRILLED THE CRACK AND FABRICATED THE REPAIR PARTS IAW SRM 53-2-0 AND INSTALLED PARTS PER SRM 53-2-0 AND 51-1-21.