As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFT CARGO DOOR THRESHOLD CORRODED. GROUNDED - YES. REMOVED CORROSION FROM AFT PIT THRESHOLD IAW B737-900 SRM 53-60-15-01-1. ORIGINAL MAT IS .045. MAT LOSS IS .005. MAT REMAINING IS .040. FOUND TO BE OUT OF LIMITS IAW B737-900 SRM 53-60-15-1A-1. RECEIVED NEW THRESHOLD PN#146AB123U25. PO#1120628.2. LOCATED AND DRILLED HOLES NEW THRESHOLD PNL IAW B737-900 SRM 51-40-05. INSTALLED NEW THRESHOLD PNL IAW B737-900 SRM 51-40-02.