What was found
MCN - MAJOR REPAIR - DURING C-15 CHECK A CRACK WAS FOUND AT THE FORWARD CARGO DOOR INNER SKIN LOWER EDGE FASTEN HOLE, BS 450. MAINTENANCE CUTOUT AND REMOVED THE DAMAGED PORTION OF SKIN AT THE LOWER FASTENER HOLE BS 450; FABRICATED A DOUBLER AND FILLER, AND INSTALLED REPAIR PARTS IAW B737-300 SRM 51-70-13, FIG. 1, SHT 1-3.