As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
R1 MOPSILL CORRODED. GROUNDED - YES. REMOVED CORR ON R1 MOPSILL AND FOUND TO BE OUT OF LIMITS IAW B737 900 SRM 53 10 15 1A 2 REMOVED MOPSILL (INNER CHORD) AND REPLACED WITH NEW INNER CHORD IAW 737 900 SRM 51 40 02 0G 0 W 3" O .080" R .069" L 6" D .011".