As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING C-CHECK INSPECTION IN BNA, THE UPPER FLOORBEAM WAS FOUND CORRODED AT FRAME 36, FROM THE RIGHT TO THE LEFT SIDE OF THE FUSELAGE. MAINTENANCE REPAIRED THE CORRODED FLOORBEAM IAW ASA EO 72-53-0131. THIS EO REF FAA FORM 8110-3, REPORT NR 02-041, WHICH INCLUDES REPAIR SPECIFICATIONS FOR AIRCRAFT N640AS. (M)