As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(LOG 2736888) DURING INSPECTION FOUND CABIN FLOOR SUPPORT STRUCTURE AT STA 540 LBL 1 CRACKED. REMOVED AND REPLACED CABIN FLOOR SUPPORT STRUCTURE AT STA 540 LBL 1, DUE TO APPROX 1" CRACK ON OTBD EOP P/N: 143A5240-33 IAW B737 SRM 51-4002-0G.