As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CENTER WING BOX BS15.04 FRUNT SPAR UPPER SURFACE HORIZONTAL STIFFNER AFT EDGE EVIDENCE OF BEING CRACKED REF AAR N/R 99880821 REMVOED AND REPLACED STIFFNER AT CENTER WING BOX STA 540 LBL 15.04 FRUNT SPAR UPPER AREA PER UNITED ECRA 5714-01151 AND B737 SRM 51-40-02