As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION ON THE LOWER PORTION OF THE FORWARD CARGO DOOR CUTOUT. GROUNDED - YES. EVALUATED FWD PIT DOOR WEB THRESHOLD AND FOUND TO BE 100% MAT LOSS AND FOUND TO BE OUT OF LIMITS IAW B737-900 SRM 53-30-15-1A-1. RECEIVED NEW WEB THRESHOLD PN#143A8122-10 PO: 1120482.1 IAW BOEING DWG: 143A8330 REV:-. REMOVED AND INSTALLED IAW B737-900 SRM 51-40-02.