What was found
FOUND FS 409+128 VERTICAL POST LBL 18.0 OTBD SIDE HAS INDICATION NOTED APPROX .2" IN LENGTH 50 PERCENT FSH AT WL 64.0 AFT FLANGE RADIUS. FAILED NDT INSPECTION. DISCONNECTED A/C CABIN AIR DUCT. REMOVED INBD AND OTBD POST. LOCATED & DRILLED OTBD POST IAW SRM 51-42-06. LOCATED AND DRILLED INBD POST. INSTALLED INBD AND OTBD POST IAW SRM 51-42-06. PAINTED POST ASSY IAW SRM 51-25-01. INSTALLED POST IAW SRM 51-42-06. C/W EC/TC REO 601R-53-41-889 AND MET ALL REQUIREMENTS OF REO 601R-53-41-889. RECONNECTED A/C FLEX DUCT.