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 L-2 UPPER INNER CHORD BETWEEN BS 962 AND BS 983 AT LBL 51, WL 209. MAINTENANCE REMOVED CORRODED L-2 UPPER INNER CHORD FROM BS 962 TO BS 983 AT LBL 51; FABRICATED A NEW REPLACEMENT INNER CHORD PER DWG 65-52878; INSTALLED REPAIR PART IAW B737-300 SRM 51-40-02.