What was found
MCN - MAJOR REPAIR - DURING C-17 CHECK, 2 EACH CRACKS WERE FOUND IN FUSELAGE SKIN AT L-1 DOOR LOWER AFT CORNER CUTOUT BS 339, STR 17 LT. MAINTENANCE CUTOUT DAMAGE IN OUTER FUSELAGE SKIN AND BEAR STRAP AT L-1 DOOR LOWER AFT CORNER CUTOUT BS 339, STR 17 LT; PERFORMED HFEC INSPECTION OF CUTOUT TO VERIFY NO CRACKS EXIST; FABRICATED A FILLER, DOUBLER, AND TRIPLER; INSTALLED REPAIR PARTS IAW ER 03-5311-05021-RC1.