As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFT CARGO DOOR THRESHOLD HAS MULTIPLE AREAS OF CORROSION. GROUNDED - YES. REMOVED CORROSION ON AFT CARGO DOOR THRESHOLD LOWER SILL WEB FOUND TO BE OUT OF LIMITS IAW B737NG SRM 53-60-15-1A-1 FIG 103. REMOVED AND REPLACED THRESHOLD IAW B737NG SRM 51-40-02 + BAC DWG 146A8340 REV C ORIGINAL THICKNESS 0.050" MAT REMOVED 0.022" MAT REMAINING 0.028".