What was found
DURING C-18 CHECK, A 1 1/8 INCH CRACK WAS FOUND IN L-1 DOOR BEAM AT LOWER FORWARD CORNER AT BS 313, STR 16 LT. MAINTENANCE CUTOUT DAMAGE IN L-1 DOOR BEAM AT LOWER FORWARD CORNER BS 313, STR 16 LT; FABRICATED A FILLER AND DOUBLER; INSTALLED REPAIR PARTS IAW B737-300 SRM 51-70-11, FIG 1.