As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFT CABIN FLOOR MOUNTED HAT CHANNEL WITH L-ANGLE ON UPPER FORWARD WALL MOUNTING HAD CORROSION AT NUT PLATE HOLES STATION 988 13 (RBL OUT TO 43.5) RBL. STR 17R (CABIN FLOOR). MAJOR REPAIR ACCOMPLISHED. CUT TO SIZE NEW SECTION OF HAT CHANNEL EXTRUSION WITH L-ANGLE FLANGE ON UPPER CENTER.