What was found
MCN - DURING C18 CHECK DISCOVERED VERTICAL BEAM WEB CRACKED, .780 INCHES IN LENGTH, AT BS178, WL 230, BL 17.1L. MAINTENANCE REMOVED DAMAGED PART OF WEB IAW BOEING 737-300 SRM 53-10-08-2R. FABRICATED REPAIR WEB IAW BOEING 737-300 SRM 53-10-08-2R. INSTALLED FABRICATED REPAIR PARTS AT BS178, WL 230, BL 17.1L IAW BOEING 737-300 SRM 53-10-08-2R.