What was found
MCN - MAJOR REPAIR - DURING C-17 CHECK A 1.4375 INCH CRACK WAS FOUND AT FASTENER HOLE ON SKIN OF L-1 DOOR CUTOUT, LOWER AFT CORNER BS 334, LBL 63. MAINTENANCE REMOVED CENTER SCUFF PLATE ATTACH ANGLE; HFEC INSPECTION INDICATED CRACKS ON ALL 3 LAYERS. TRIMMED OUT CRACK IN BEAR STRAP AND SKIN; PERFORMED HFEC TO VERIFY NO CRACKS EXIST. FABRICATED A REPAIR DOUBLER, TRIPLER AND FILLER; INSTALLED REPAIR PARTS, AND REINSTALLED CENTER SCUFF PLATE ATTACH ANGLE IAW AWA ER 03-5300-03126-SS1.