As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAIN CABIN; FLOOR STRUCTURE SUPPORT HAS CRACK AT STA 540 BL0 TO RBL 24.75. REPLACED SUPPORT BRACKET AND FASTENERS LOCATED MAIN CABIN FLOOR STRUCTURE AT STA 540 BL0 TO RBL 24.75 IAW B737-700 SRM 51-40-02-0G AND DWG: 143A0060 SHEET: 46 REV: -.