What was found
MCN - MAJOR REPAIR - DURING C-16 CHECK , A BULKHEAD WEB WAS FOUND CRACKED AT B.S. 178. CRACK WAS CONFIRMED WITH HFEC. MAINTENANCE REMOVED DAMAGED AREA OF BULKHEAD WEB BS 178; FABRICATED A REPAIR DOUBLER, FILLER, AND 3 EACH SHIMS; AND INSTALLED REPAIR PARTS IAW B737-300 SRM 53-10-08, PG. 287-288J, FIG. 211.