As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT DUE C 9 CHECK. MAIN CABIN FLOORBEAM HAS CORROSION 5" AFT OF FRAME 66, & 10" INBD OF Y765. CORRODED AREA FOUND TO HAVE OVER 50% MATERIAL LOSS. R & R FLOORBEAM IAW SRM 52-42-11 PARA 2 D. ACFT DUE OUT OF C CHECK 12 16 2015. REFERENCE NR 35394.