What was found
INSPECTION TYPE: C, LT WING L/E RIB AT ILES 765.45 FOUND CORROSION AT ROTARY ACTUATOR MOUNTING BOLT HOLES BORE AND CUTOUT SURFACE. CORROSION BLEND OUT 0.018 INCH X 0.5 INCH X 0.5 INCH EXCEED SRM LIMIT. WING LEADING EDGE RIB INTERMIN CORROSION REPAIR CUTOUT AS PER EO B747-5740-17207 APPENDIX -A-. COMPLETED REPAIRS TO BE DETAIL VISUALLY INSPECTED AT EVERY C-CHECK NOT TO EXCEED 18 MONTHS AS PER EO B747-5740-17207 APPENDIX B.