A clearance control system for a gas turbine engine comprising: at least one case support associated with an engine case defining an engine center axis (A), the at least one case support including a first radial wall portion extending inwardly from the engine case ; a clearance control ring positioned adjacent the at least one case support to form an internal cavity between the engine case and the clearance control ring , wherein the clearance control ring includes a first mount feature ; an outer air seal having a second mount feature cooperating with the first mount feature such that the clearance control ring can move independently of the engine case in response to changes in temperature; an injection source to inject flow into the internal cavity to control a temperature of the clearance control ring to allow the outer air seal to move in a desired direction to maintain a desired clearance between the outer air seal and an engine component ; and the at least one case support includes a second radial wall portion axially spaced from the first radial portion to define the internal cavity , the clearance control ring is radially moveable relative to the first and second radial wall portions in response to changes in temperature, characterized in that : the clearance control system further comprises a seal support portion fit to the engine case adjacent to the at least one case support , wherein the seal support portion includes a radially outward portion that is fit within a groove formed in the engine case adjacent each of the first and second radial wall portions to seat an assembly of the at least one case support , clearance control ring and outer air seal relative to the case , and wherein the clearance control ring is not directly tied to the engine case or the seal support portion . at least one case support associated with an engine case defining an engine center axis (A), the at least one case support including a first radial wall portion extending inwardly from the engine case ; a clearance control ring positioned adjacent the at least one case support to form an internal cavity between the engine case and the clearance control ring , wherein the clearance control ring includes a first mount feature ; an outer air seal having a second mount feature cooperating with the first mount feature such that the clearance control ring can move independently of the engine case in response to changes in temperature; an injection source to inject flow into the internal cavity to control a temperature of the clearance control ring to allow the outer air seal to move in a desired direction to maintain a desired clearance between the outer air seal and an engine component ; and the at least one case support includes a second radial wall portion axially spaced from the first radial portion to define the internal cavity , the clearance control ring is radially moveable relative to the first and second radial wall portions in response to changes in temperature, characterized in that : the clearance control system further comprises a seal support portion fit to the engine case adjacent to the at least one case support , wherein the seal support portion includes a radially outward portion that is fit within a groove formed in the engine case adjacent each of the first and second radial wall portions to seat an assembly of the at least one case support , clearance control ring and outer air seal relative to the case , and wherein the clearance control ring is not directly tied to the engine case or the seal support portion . <EOS>