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 A .5 INCH CRACK WAS FOUND IN LOWER SURFACE OF STRINGER SPLICE CHANNEL AT BS 360, STR 15 LT. MAINTENANCE REMOVED CRACKED STRINGER SPLICE CHANNEL AT BS 360, STR 15 LT; FABRICATED A NEW REPLACEMENT SPLICE CHANNEL PER DWG 65-61777; INSTALLED REPAIR PART IAW B737-300 SRM 51-40-02.