As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING M-CHECK FOUND MAIN PASSENGER CABIN FLOOR PANEL 55 FORWARD END SKIN CHAFED AND TORN AROUND FASTENER HOLES. REMOVED CABIN FLOOR PANEL.RECEIVED NEW FLOOR PANEL PICKED UP AND COUNTERSUNK ALL HOLES AND INSTALLED FLOOR PANEL IAW DC9 SRM 51-10-4 AND DC-9 SRM 51-30-1.