What was found
MCN - MAJOR REPAIR, DURING C-17 CHECK EXFOLIATION CORROSION WAS FOUND ON L-1 DOOR SILL IB STIFFENER ANGLES AT SCREW HOLES BS 328, LBL 60. MAINTENANCE REMOVED 2 EACH CORRODED STIFFENER ANGLES AT BS 328, LBL 60; FABRICATED 2 EACH NEW REPLACEMENT ANGLES IAW DWG 65-17688; INSTALLED REPAIR PARTS IAW SRM 51-40-02, FIG. 12.