As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FWD PIT DOOR CUTOUT LOWER SILL WEB IS CORRODED. DOT # RSM 13-001. GROUNDED - YES. CORROSION FOUND TO BE 100% MAT LOSS, OUT OF LIMITS IAW 737-900ER SRM 53-30-15-1A-1. REMOVED AND REPLACED SILL WEB IAW 737-900ER SRM 51-40-02-0G-0.W= 6.5" O= .045 R= 0.00 L= 4FT D= .045.