As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFT CARGO PIT DOOR CUT OUT THRESHOLD WEB IS CORRODED. GROUNDED - YES. REMOVED CORR FOUND TO BE OUT OF LIMITS IAW 737 900EA SRM 53 60 15 1A 1, REMOVED AND REPLACED THRESHOLD WEB IAW 737 900 ER SRM 51 40 02 0G 0 W 2.5" O .050 R .035 L 4.5" D .015.