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-15 CHECK A .5 INCH CRACK WAS FOUND IN STRINGER TIE CLIP AT BS 639, STR 4 RT. MAINTENANCE REMOVED CRACKED STRINGER TIE CLIP AT BS 639, STR 4 RT; FABRICATED A NEW REPLACEMENT CLIP PER DWG 65-46540; INSTALLED REPAIR PART IAW B737-300 SRM 51-40-02 FIG 2 & 8.