As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFT CARGO DOOR CUTOUT LOWER SILL WEB CORRODED. GROUNDED - YES. REMOVED CORROSION & FOUND TO BE OUT OF LIMITS IAW B737-900ER SRM 53-60-15-1A-1, REMOVED AND REPLACED LOWER SILL WEB IAW B737-900ER SRM 51-40-02-0G-0W= 2' O= .045" R= .036" L= 5" D= .009".