As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
GYR - MAJOR REPAIR - DURING C18 CHECK DISCOVERED CORROSION ON AFT CARGO COMPARTMENT BILGE ON SHEAR TIE AT BS 827, WL 250 AND FROM STR 28R TO STR 27R. MAINTENANCE CUT OUT DAMAGED SECTION OF SHEAR TIE IAW BOEING 737-300 SRM 53-00-07-2R. FABRICATED REPAIR SHEAR TIE AND INSTALLED FROM STR 28R TO STR 27R, WL 205 AND BS 827 IAW BOEING 737-300 SRM 53-30-07-2R4.