As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE IN HEAVY MAINTENANCE PERFORMING INSPECTIONS IT WAS NOTED THAT THE CABIN FLOORBEAM UPPER FLANGE IS CORRODED ON LOWER SURFACE AT B.S 950D RBL 21. CORROSION WAS OUT OF LIMITS REMOVED DAMAGED FLOORBEAM P/N BAC 1505-100617, FABRICATED REPAIR ANGLE BAC 1490-2685, FABRICATED FILLER. INSTALLED REPAIR, NO OTHER DEFECTS WERE NOTED. ACFT RETURNED TO SERVICE.