As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING HEAVY MAINTENANCE, CORROSION WAS DISCOVERED ON CABIN FLOOR STRUCTURE RT WEB PANEL AT FR20; BLENDED FOUND MATERIAL LOSS OUT OF LIMITS REMOVED AND REPLACED CABIN FLOOR STRUCTURE RT WEB PANEL AT FR20 STR 23 IAW SRM 51-42-11 PAE2 AND 51-74-00 WORK ACCOMPLISHED PER PRODUCTION NUMBER 440484-26694