What was found
LCQ - MAJOR REPAIR - DURING C-04 CHECK A 1" CRACK WAS FOUND AT THE FORWARD UPPER CORNER RADIUS OF THE INBOARD FLAP, OUTBOARD TRACK FAIRING ASSEMBLY, INBOARD SIDE OF EXTERNAL SHELL, L/H ENG PYLON. MAINTENANCE CUTOUT CRACKED AREA AT THE FORWARD UPPER CORNER RADIUS OF THE INBOARD FLAP, OUTBOARD TRACK FAIRING ASSEMBLY, INBOARD SIDE OF EXTERNAL SHELL, L/H ENG PYLON; PERFORMED HFEC INSPECTION OF CUTOUT TO VERIFY NO CRACKS EXIST; FABRICATED A FILLER AND DOUBLER; AND INSTALLED REPAIR PARTS IAW B737-300 SRM 54-50-70, FIG. 204.