As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CRACK FOUND ON CABIN FLOOR SUPPORT, APPROXIMATELY 2.5 INCHES LONG AT FLOOR 221EF, (STREAMER ATTACHED AND CIRCLED IN RED). GROUNDED - YES. REMOVED INTERCOSTAL IAW B737-900 SRM 51-40-02. LOCATED, DRILLED AND INSTALLED NEW INTERCOSTAL IAW BOEING DWG 141A5400 REV-.