What was found
LEFT WING FIXED LEADING EDGE RIB, W.S. 456.98, HAD CORROSION IN ANTI-ICE TAIL DUCT TO LEADING EDGE SLAT AT WING FIXED LEADING EDGE RIB. REMOVED CORRODED RIB AND INSTALLED NEW STRUT IAW BOEING SRM 51-40-02, 57-41-09, AND BAC DWG 114T2202.