What was found
DURING C CHECK INSPECTION, CORROSION WAS FOUND ON THE BOTTOM OF THE AFT SHEAR PLATE AT FRAME 69, ON THE LEFT SIDE OF THE FUSELAGE. MAINTENANCE REMOVED AND REPLACED THE AFT SHEAR PLATE IN ACCORDANCE WITH THE REQUIREMENTS OF SRM 51-42-11. FOLLOWING COMPLETION OF THE INSTALLATION, THE AFT SHEAR PLATE WAS INSPECTED AND FOUND TO BE ACCEPTABLE.