What was found
MCN - MAJOR REPAIR - DURING C-15 CHECK A .5 INCH CRACK WAS FOUND IN STRINGER TIE CLIP AT BS 312, STR 23 LT. MAINTENANCE REMOVED CRACKED STRINGER TIE CLIP AT BS 312, STR 23 LT; FABRICATED A NEW REPLACEMENT TIE CLIP PER DWG 69-35364; INSTALLED REPAIR PART IAW B737-300 SRM 51-40-02 FIG 8, 12.