As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MCN - MAJOR REPAIR - DURING C19 CHECK DISCOVERED SKIN CRACK AT FASTENER HOLE AT BS 591 AND STR 4L. MAINTENANCE CUT OUT DAMAGED AREA OF SKIN IAW BOEING 737-300 SRM 53-00-01-2R30. FABRICATED FILLERS AND DOUBLERS IAW BOEING 737-300 SRM 53-00-01-2R31. INSTALLED FABRICATED REPAIR PARTS FROM BS 585 TO BS 591 AND STR 4L IAW BOEING 737-300 SRM 53-00-01-2R30.