As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING C-CHECK IN BNA, FLOOR SUPPORT FLANGES ARE CORRODED ON THE FRAME AT STA 258 BETWEEN LBL 16 AND RBL 12. MAINTENANCE REMOVED CORROSION IAW SRM 51-70-40. MATERIAL REMOVED IS OUT OF LIMITS. REPAIRED ANGLES, FABRICATED FROM 2024-T-3 .050 IN REFERENCE TO 53-70-20. ALODINED AND PRIMED TOPCOAT APPLIED, INSTALLED IAW SRM 51-40-21/ 51-20-50 AND 53-70-30.