As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MCN - MAJOR REPAIR - DURING C-17 CHECK A .25 INCH CRACK WAS FOUND ON EDGE OF LIGHTENING HOLE ON BS 178 BULKHEAD VERTICAL WEB AT RBL 17.1, WL 193. MAINTENANCE REMOVED CRACKED BS 178 BULKHEAD VERTICAL WEB AT RBL 17.1, WL 193; FABRICATED A NEW REPLACEMENT VERTICAL WEB PER DWG 65-17583; INSTALLED REPAIR PARTS IAW B737-300 SRM 51-40-02 FIG 12 PG 1.