What was found
WHILE PERFORMING 2C INSPECTION TASK 5210-131-01I, FOUND CHANNEL BELOW PAX DOOR SILL JUST AFT OF FUSELAGE FRAME 13A TO HAVE HEAVY CORROSION ON LOWER FLANGE. REMOVED CORRODED PART AND INSTALLED SERVICEABLE CHANNEL OF SAME PART NUMBER, USING SAME PART NUMBER FASTENERS IAW SRM CHAPTER 51.