FIG. 4 is a schematic and conceptual block diagram of an example system for fabricating a control component for an engine, the control component including a housing including an exterior layer and an interior polymeric layer.

FIG. 5 is a flow diagram of an example technique for fabricating a control component for an engine, the control component including a housing including an exterior layer and an interior polymeric layer.

The disclosure generally describes control components for monitoring and controlling engines. In some examples, the disclosure describes a control component for controlling a combustion-cycle based engine such as a gas turbine engine. The control component may include a housing including an exterior layer and an interior polymeric layer. The interior polymeric layer may include an electrically and thermally conductive material. In some examples, the disclosure describes example techniques for forming control components. The techniques may include forming the exterior layer and forming the interior polymeric layer adjacent to and substantially coextensive with the exterior layer, for example, using additive manufacturing.