As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING MAINTENANCE BASE VISIT FOUND THE RIGHT FLOOR SILL HAS CORROSION BETWEEN FRAME 280 AND FRAME 319. THE AIRCRAFT WAS REMOVED FROM SERVICE. REPAIRED CORROSION BETWEEN FRAME 280 AND FRAME 319 IAW EO-CR-MR-171. THE AIRCRAFT WAS RETURNED TO SERVICE.