As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFT CARGO PIT DOOR CUTOUT LOWER DOOR SILL WEB HAS CORROSION AT STA 800 RBL 25. GROUNDED - YES. REMOVED CORROSION FROM AFT CARGO PIT DOOR CUTUOT LWR DOOR SILL WEB FOUND TO BE OUT OF LIMITS IAW B737-900ER SRM 53-60-15-1A-1 FIG 103 DETAIL D, REMOVED & REPLACED LWR DOOR SILL WEB IAW B737-900ER SRM 51-40-02-0G-0 FIG 10 & PARA 5 W: 2.4" O: .050" R: .043" L: 2.7" D: .007".