As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFT CABIN UNDER FLOOR COMPARTMENT FRAME 72 AT BOTTOM BUTT LINE 0 HAS 10 SQ INCH LIGHT SURFACE CORROSION ON FWD AND AFT SIDE OF FRAME. R & R CORRODED SPLICES ,CORRODED SHEAR TIES AND SKIN BUTT SPLICE BETWEEN STRINGERS 56L, STRINGER 57 AND STINGER 56R IAW SRM 51-72-11. CHECKED FRAME 72 FOR CORROSION NO CORROSION NOTED.