As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE BL 0.07 FLOORBEAM OF THE WING CENTER SECTION IS CRACKED AT STA 661 AND THE UPPER CAP OF THE BEAM IS COMPLETELY CRACKED THROUGH, INCLUDING TWO FASTENER HOLES. THIS AREA WILL BE TRIMMED OUT. NO CRACKS WERE FOUND IN THE WEB. THE CRACK IS TYPICAL PER BOEING SERVICE BULLETIN 737-57-1210, ER/A 302502-14 INSTALLED THE SERVICE BULLETIN REPAIR FOR THE CONDITION.