Repair of turbine exhaust case

Process for repairing a horizontal mount area of a JT9D turbine exhaust case, the turbine exhaust case having two mounting flanges on the outside of a case wall of the turbine exhaust case for attaching the turbine exhaust case to a rear engine mount through horizontal mounting pinholes in the mounting flanges, wherein the horizontal mount area is the area of the case wall of the turbine exhaust case adjacent to and between the horizontal mount pinholes in the two mounting flanges, near a rear engine mount attachment point, comprising:

• inspecting the horizontal mount area of the turbine exhaust case;
• weld repairing any defects found in the case wall of the horizontal mount area;
• and
• installing a reinforcement brace onto the inside of the case wall in the horizontal mount area, wherein the reinforcement brace overlaps an area under one mounting flange and extends to and overlaps the area under the second mounting flange, and wherein the reinforcement brace comprises a metal plate.