What was found
MCN - MAJOR REPAIR - DURING C-18 CHECK A .625 INCH CRACK WAS FOUND IN INTERCOSTAL AT BS 329, LBL 46, WL 208. MAINTENANCE REMOVED CRACKED INTERCOSTAL AT BS 329, LBL 46; FABRICATED A NEW REPLACEMENT INTERCOSTAL PER DWG 65-45834; INSTALLED REPAIR PART IAW B737-300 SRM 51-40-02.