As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFT PASSENGER CABIN FLOOR STRUCTURE AT AFT SERVICE DOOR (R2) HAS CORROSION. GROUNDED - YES. REMOVED DAMAGE, FOUND TO BE OUT OF LIMITS, REMOVED AND REPLACED R2 DOOR MOP SILL IAW B737-900 SRM 51-40-02-0G-0 AND SRM 53-70-15-1A-1W= 2" O= .080 R= .054 L= 1" D= .026.