What was found
MCN - MAJOR REPAIR - DURING C-15 CHECK A .75 INCH CRACK WAS FOUND ON STRINGER TIE CLIP AT BS 500, STR 28 LT. MAINTENANCE REMOVED CRACKED STRINGER TIE CLIP AT BS 500, STR 28 LT; FABRICATED A NEW REPLACEMENT TIE CLIP PER DWG 69-35350-9; INSTALLED REPAIR PART IAW B737-300 SRM 51-40-02, FIG 8 & 12, PG 1, 38, & 45.