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-05 CHECK CORROSION WAS FOUND ON RT TORQUE BOX STIFFENER AT BS 1106, STR 17 RT. MAINTENANCE REMOVED CORRODED RT TORQUE BOX STIFFENER AT BS 1106, STR 17 RT; FABRICATED A NEW REPLACEMENT STIFFENER PER DWG 65-46579; INSTALLED REPAIR PART IAW B737-300 SRM 51-40-02.