What was found
MCN - MAJOR REPAIR - DURING C-12 CHECK A 1/4" CRACK WAS FOUND ON STRINGER TIE CLIP AT BS 420, STR 9 R/H. MAINTENANCE REMOVED CRACKED STRINGER TIE CLIP AT BS 420, STR 9 R/H, FABRICATED A NEW REPLACEMENT STRINGER TIE CLIP, AND INSTALLED REPAIR PART IAW B737-300 SRM 51-40-02, PG. 38, FIG. 8.