As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAJOR REPAIR, LEVEL 2 CORROSION. CORROSION FOUND ON FLOOR BEAM 9 ON THE UPPER FLANGE 3 INCHES LT AND RT OF THE CENTER LINE. BLEND OUT OF CORROSION BEYOND SRM ALLOWABLE LIMIT. CUT OUT DAMAGED AREA ON FLOORBEAM AND INSTALLED A DOUBLER AND FILLER.