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 1" CRACK WAS FOUND ON FLOOR BEAM SUPPORT ANGLE BS 400, BL 0. MAINTENANCE REMOVED DAMAGED FLOOR BEAM SUPPORT ANGLE AT BS 400, BL 0. FABRICATED A NEW FLOOR BEAM SUPPORT ANGLE, AND INSTALLED REPAIR IAW B737-200 SRM 51-30-2, PG. 2-3.