As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED AND IS IN CHECK FOR SCHEDULED MX. DURING INSPECTION FOUND CABIN FLOOR BEAM Y254 AT FR20 CORRODED. REQUIRES REPLACEMENT AS PER SRM 51-72-11-911-001 REV 43. FLOOR BEAM Y254 AT FR12-24 REPLACED AS PER SRM 51-72-11-911-001 REV 43. MX ACTION IS ACCEPTABLE.