As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING C-16 CHECK A .25 INCH CRACK WAS FOUND IN AFT CARGO DOOR INNER SKIN AT LIGHTENING HOLE IN LOWER FORWARD CORNER BS 807, RBL 42, WL 163. MAINTENANCE CUTOUT CRACK IN AFT CARGO DOOR INNER SKIN AT LOWER FORWARD CORNER; FABRICATED A FILLER AND 2 EACH REPAIR PLATES; INSTALLED REPAIR PARTS IAW B737-300 SRM 51-70-13 FIG 1.