As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AAI: MAIN CABIN; FLOOR STRUCTURE SUPPORT HAS CRACK AT STA 540; BL 0 TO RBL 24.75. REPLACED FLOOR STRUCTURE SUPPORT LOCATED PASSENGER CABIN FLOOR STRUCTURE STA540 BL 0 TO RBL 24.75 AND FASTENERS IAW B737-700 SRM 51-40-02;DWG 143A5240 SHEET: 13 REV: - AND 143A0060 SHEET 43 REV-.