As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE ACCOMPLISHING VISUAL INSPECTION DURING SERVICE CHECK, A CRACK WAS DISCOVERED AT BS 306 AT STR 18. MAINTENANCE ALONG WITH ENGINEERING IS RESEARCHING THE REPAIR. ECO 3673 REPAIRED CRACKED. 8100-9 WAS RECEIVED FROM BOEING. AIRCRAFT WAS RETURNED TO SERVICE.