What was found
MCN - MAJOR REPAIR - DURING C-17 CHECK A 6 INCHES CRACK WAS FOUND IN FUSELAGE SKIN AT BS 727D+17, STR 22 LT. MAINTENANCE CUT OUT CRACK IN FUSELAGE SKIN AT BS 727D+17, STR 22 LT; PERFORMED HFEC INSPECTION TO VERIFY NO CRACKS EXIST; FABRICATED A FILLER, DOUBLER, AND TRIPLER; INSTALLED REPAIR PARTS IAW B737-300 SRM 53-00-01 FIG 229.