As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CABIN FLOOR SUPPORT CHANNEL, STA 540, RBL 0 TO 25 IS CRACKED AT ATTACH POINTS. RBL 1 REMOVED CRACKED FLOOR SUPPORT AT STA 540 FROM BL 0 TO RBL 25. FABRICATED NEW FLOOR SUPPORT FROM 7075-.040 (PO PAC66866) IAW BOEING DWG 143A5240. ALODINED AND PRIMED SUPPORT IAW B737-7 SRM 51-20-01. INSTALLED FLOOR SUPPORT WITH FASTENERS IAW B737-7 51-40-02.