As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFT WET AREA SILL WEB CORRODED AT STA 1030 RBL-28. GROUNDED - YES. REMOVED CORROSION, FOUND TO BE OUT OF LIMITS IAW B737-900ER SRM 53-70-51-1A-1, REMOVED AND REPLACED AFT WET AREA SILL WEB IAW B737-900ER SRM 51-40-021-0G-0W= 1IN O= .070 R= .046 L= 2IN D= .024.