As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(B737-53-3-0737) MAIN CABIN FWD WET AREA, MACHINED INTERCOSTAL FROM STA 344-360 BL 0 HAS 2EA POSSIBLE CRACKS IN UPPER FLANGE AT FLOOR PANEL ATTACH HOLES. REMOVED AND REPLACED MACHINED INTERCOSTAL IAW DWG NO. 141A540010 REV B AND SRM 51-40-02.