What was found
AFT CARGO PIT THRESHOLD WEB HAS MULTIPLE SPOTS OF CORROSION. GROUNDED - YES. REMOVED CORROSION FROM AFT CARGO PIT THRESHOLD WEB. ORIG .050",REMOVED.007" REMAINING .043. FOUND TO BE OUT OF LIMITS IAW B737-900 SRM 53-60-15-1A-1. REMOVED WEB IAW B737-900 SRM 51-40-02. RECEIVED NEW WEBPN: 146A8123U25. PO:1106827.5 LOCATED AND DRILLED NEW THRESHOLD WEB IAW B737-900 SRM 51-40-05. INSTALLED NEW THRESHOLD WEB IAW B737-900 SRM 51-40-02 REF DWG 146A8340 REV: -.