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 DOOR FORWARD TORQUE BOX FRAME AT BS 794.3, STR 25 RT. MAINTENANCE REMOVED CORRODED SECTION AFT CARGO DOOR FORWARD TORQUE BOX FRAME AT BS 794.3, STR 25 RT; FABRICATED A NEW REPLACEMENT SECTION OF FRAME; INSTALLED REPAIR PART IAW B737-300 SRM 51-40-02.