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 LBL 24.75. REPLACED SUPPORT BRACKET AND FASTENERS LOCATED MAIN CABIN FLOOR STRUCTURE AT STA 540 BL0 TO LBL 24.75 IAW B737-700 SRM 51-40-02-0G AND DWG: 143A0060 SHEET: 46 REV: -.