As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE IN HEAVY MAINTENANCE PERFORMING INSPECTION IT WAS NOTED THAT THE WING CENTER SECTION UPPER LOBE T-CHORD IS CRACKED AT BS 760.9 RBL 24.75. THE T-CHORD WAS REMOVED AND REPLACED AT STATION 740-850 RBL 24.75. NO OTHER DEFECTS WERE NOTED. AIRCRAFT WAS RETURNED TO SERVICE.