What was found
OTBD VERTICAL POST AT FS 409.00+128, RBL 18 HAS AN INDICATION NOTED AT WL 69.00 .3" LONG X 55 PERCENT FSH. FAILED NDT INSPECTION AFT FLANGE RADIUS. REMOVED INBD & CRACKED OTBD VERTICAL POST AT FS 409+128 RBL 18 IAW SRM 51-42-06. LOCATED FASTENER HOLES IN NEW INBD POST PN: 601R32208-32S & OTBD, POST PN: 601R32208-156 IAW SRM 51-40-11. BENCH ASSEMBLED THE INBD & OTBD FS 409, RBL 18 VERTICAL POSTS. LOCATED & DRILLED 409 POST ASSY & INSTALLED IAW SRM 51-42-22-00 & 51-40-11-00 & 51-42-06.