As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFT CARGO PIT LOWER SILL WEB CORRODED AND HAS PREV. BLEND OUT. GROUNDED - YES. REMOVED CORROSION ON AFT CARGO LOWER SILL WEB, FOUND TO BE OUT OF LIMITS IAW B737-800 SRM 53-60-15-1A-1. REMOVED AND REPLACED LOWER SILL WEB P/N:146A8123U25 P.O.#1129699.2 IAW BAC DWG 146A8120 REV.A & B737-800 SRM 51-40-02. ORIGINAL THICKNESS IS .050", MATERIAL REMOVED IS .025", REMAINING MATERIAL IS .025".