What was found
MAIN CABIN FLOOR STR STA 310 TO 324 LBL 20 HAS AREA OF CORROSION AROUND NUT PLATES. (OUT OF LIMITS) REMOVED FLOOR SUPPORT IAW SRM 51-40-02. FABRICATED NEW IAW SRM 51-10-02. INSTALLED FLOOR SUPPORT AND ANGLES STA 310-324, LBL 20, IAW SRM 51-40-02. CATEGORY "A". MAJOR REPAIR.