As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MCN - MAJOR REPAIR - DURING C-16 CHECK A CRACK WAS FOUND EMANATING FROM EXTERNAL SKIN COUNTERSUNK FASTENER HOLE AT THE UPPER AFT CUTOUT OF THE L2 DOOR. MAINTENANCE STOP DRILLED CRACKS ON FIRST AND SECOND LAYER OF SKIN AND PERFORMED HFEC INSPECTION VERIFYING THE CRACKS WERE CONTAINED. FABRICATED INNER, MIDDLE, AND OUTER PATCH AND INSTALLED REPAIR PARTS IAW B737-300 SRM 53-60-01, PG. 205-207