What was found
AFT CARGO DOOR CUTOUT THRESHOLD WEB HAS SEVERAL AREAS OF CORROSION. GROUNDED - YES. REMOVED CORROSION ON AFT CARGO THRESHOLD WEB. ORIGINAL THICIKNESS: .050, REMOVED .016, REMAINING: .034. FOUND TO BE OUT OF LIMITS IAW B737-900ER SRM 53-60-15. REMOVED DAMAGED WEB, LOCATED & DRILLED NEW WEB PN: 146A8123U25 PO: 1103417.2, AND INSTALLED WEB IAW B737-900ER SRM 51-40-02, B737-900ER SRM 51-40-05 AND BOEING DWG:146A8340, REV:GTOOL# T8224V DUE: 27/MAR/25