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-18 CHECK CORROSION WAS FOUND ON AFT CARGO COMPARTMENT DOOR SILL UPPER STRAP BETWEEN BS 794 AND BS 847 AT STR 25 RT. MAINTENANCE REMOVED CORRODED SECTION AFT CARGO DOOR SILL UPPER STRAP FROM BS 794 TO BS 847 AT STR 25 RT; FABRICATED A NEW REPLACEMENT STRAP; INSTALLED REPAIR PART IAW B737-300 SRM 51-40-05, FIG 2.