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 2 EACH CRACKS WERE FOUND ON STRINGER SPLICE AT BS 906, STR 4 LT. MAINTENANCE REMOVED CRACKED STRINGER SPLICE AT BS 906, STR 4 LT; FABRICATED A NEW REPLACEMENT STRINGER SPLICE PER DWG 65-51698; INSTALLED REPAIR PART IAW B737-300 SRM 51-40-02 FIG 8 & 12 PG 1, 38 & 45.