As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFT CARGO, RIGHT SIDE PLATE CHANNEL CORRODED FROM STA 727+4 TO CARGO DOOR. GROUNDED - YES. REMOVED CORROSION AND CHECK LIMITS FOUND TO BE OUT OF LIMITS IAW B737-900ER SRM 53-00-53-1A-2, REMOVED AND REPLAECD TRANSITION SIDE PLATE CHANNEL IAW B737-900 SRM 53-00-53-2R-5.