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-19 CHECK CORROSION WAS FOUND ON UPPER CHORD AT BS 294 BETWEEN RBL 7 AND RBL 44, WL 208. MAINTENANCE CUTOUT DAMAGED UPPER CHORD AT BS 294 FROM RBL 7 TO RBL 44; FABRICATED A NEW REPLACEMENT SECTION OF UPPER CHORD AND 2 EACH REPAIR ANGLES; INSTALLED REPAIR PARTS IAW B737-300 SRM 53-10-51, FIG 205.