What was found
FS 409+128, RBL 18 VERT POST INBD AND OTBD SIDES HAVE INDICATIONS NOTED IN THE AFT FLANGE RAD II AT WL 69 .250" LONG X 50 PERCENT FSH. BOTH FAILED NDT INSP. REMOVED VERTICAL POST ASSY AT FS 409+128, RBL 18. INSTALLED RBL 18 FS 409 POST IAW REO 601R-53-41-889, REV A AND SRM 51-42-06. FABRICATED REPLACEMENT STIFFENER SAME AS PN 601R32208-32 USING 7075-0.063" PO W34348 IAW EO EO1R32208.