What was found
MCN - MAJOR REPAIR - C-11 CHECK - NR 5988878, CORROSION ON THE L4 DOOR CUT LOWER SILL ATTACH CHANNEL CLIP, BS 1640, S17L, WL 208. REPLACED THE L4 DOOR CUT LOWER SILL ATTACH CHANNEL CLIP, BS 1640, S17L, WL 208 IAW B757-200 SRM 51-40-02.