What was found
MCN - MAJOR REPAIR - DURING C-17 CHECK, GALVANIC CORROSION WAS FOUND ON UPPER SURFACE, UPPER FLANGE, OF FRAME AT BS 847, RBL 17.50. MAINTENANCE CUTOUT CORRODED SECTION OF FRAME AT BS 847, RBL 17.50; FABRICATED A 2 EACH ANGLES, A FILLER, SUPPORT CHANNEL, CLIP, AND STRAP, INSTALLED REPAIR PARTS IAW E.R. 03-5302-05028-ES2.