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-15 CHECK A .5 INCH CRACK WAS FOUND IN UPPER ATTACH ANGLE OF FLOOR INTERCOSTAL BETWEEN BS 380 AND BS 400, BL 0. MAINTENANCE REMOVED CORRODED UPPER ATTACH ANGLE ON FLOOR INTERCOSTAL FROM BS 380 TO BS 400, BL 0; FABRICATED A NEW REPLACEMENT ANGLE PER DWG 69-35365-4; INSTALLED REPAIR PART IAW B737-300 SRM 51-40-02 FIG 8 & 12.