What was found
MAIN CABIN FLOORBEAM STA 340 LBL 29 TO 32 HAS AREA OF CORRODED OUT OF LIMITS. REMOVED CORROSION FROM FLOORBEAM IAW SRM 51-10-02. CHECKED LIMITS AND FOUND TO BE OUT OF LIMITS IAW SRM 53-00-04. REMOVED 4EA. NUTPLATES, 2EA. BRACKETS, AND FLOORBEAM IAW SRM 51-40-02. RECEIVED NEW FLOORBEAM PN 141N5170-29. LOCATED AND DRILLED FLOORBEAM IAW SRM 51-40-05. INSTALLED 4EA NUTPLATES, 2EA BRACKETS, FLOORBEAM AND ALL REPAIR PARTS SRM 51-40-02. THIS REPAIR IS CLASSIFIED AS A CAT "A" MAJOR REPAIR