As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFT PIT LOWER MAIN SILL THRESHOLD WEB HAS SEVERAL SPOTS OF CORROSION BETWEEN BS800 - BS840. GROUNDED - YES. REMOVED CORROSION ON AFT PIT LOWER MAIN SILL THRESHOLD WEB, ORIG. 0.045, REMAINING 0.039, REMOVED 0.006 AND FOUND TO BE OUT OF LIMITS PER B737-800 SRM 53-60-15. REMOVED AND REPLACED WEB PER BAC DWG 146A8340 REV.- AND B737-800 SRM 51-40-02.