As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAIN CABIN FLOOR STA 312 TO 328 RBL31 INTERCOSTAL IS CRACKED. GROUNDED - YES. REMOVED DAMAGED INTERCOSTAL MODIFIED INTERCOSTAL P #141A5410-140PER B737-800 SRM 53-10-51-2R REPAIR 12, INSTALLED MODIFIED INTERCOSTAL PER B DWG 141A5400 AND SRM 51-40-02.