As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING INSPECTION FOUND PASSENGER CABIN FLOOR INTERCOSTAL CORRODED AT FASTENER HOLES STATION 294-312 LBL 12". MAINTENANCE LOCATED AND DRILLED NEW INTERCOSTAL IAW BOEING DOCUMENT 141A5600 REV N & SRM 51-40-05. INSTALLED NEW INTERCOSTAL, CABIN FLOOR, STA 294-312 LBL 12 IAW DOCUMENT 141A5600 REV N & SRM 51-40-02.