As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAIN CABIN FLOR SUPPORT STRUCTURE IS CRACKED AT STA 540 APPROX LBL1. GROUNDED - YES. REMVOED CRACKED FLOOR SUPPORT /BREAK PNL ASSY IAW B737-800 SRM 51-40-02DRILLED TO FIX NEW FLOOR SUPPORT /BREAK PNL ASSY IAW B737-800 ARM 51-40-05 AND BAC DWG 143A0060 REV A.