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-18 CHECK A .5 INCH CRACK WAS FOUND ON INTERCOSTAL AT BS 500A, STRINGER 25 RT. MAINTENANCE REMOVED INTERCOSTAL FROM BS 500A, STRINGER 25 RT, FABRICATED A NEW INTERCOSTAL PER DWG 69-41473, AND INSTALLED REPAIR IAW B737-200 SRM 51-30-2 PG 8-9 & 32.