As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING SCHEDULED MAINTENANCE, FOUND THE LEFT CABIN FLOOR SILL HAD CORROSION AROUND NUT PLATE HOLES FROM FS 449.85 TO FS 559.00. THE PRESSURE FLOOR SILL ASSEMBLY WAS INSPECTED AND REPAIRED USING AIRCRAFT MAINTENANCE MANUALS. AIRCRAFT WAS RELEASED FOR SERVICE.