As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING HEAVY MAINTENANCE, DURING DVI OF CABIN FLOOR STRUCTURE BTW FR 12-24 FOUND Y254 FR 12-24 BEAM CORRODED. REWORK REQUIRED IAW SRM 53-11-14-283-004 REV. 129; THIS REWORK IS OUT OF SRM LIMITS. THERE IS NO APPLICABLE REPAIR FOR THE DAMAGED BEAM AS PER SRM 53-11-14-283-004 REV.129. ( THE DAMAGE IS WITHIN THE SPLICING AREA). DAMAGED BEAM REPLACED AS PER SRM 51-72-11-911-001 REV.129. MAJOR REPAIR.