An air turbine starter for starting an engine, comprising: a housing defining an inlet, an outlet, and a flow path extending between the inlet and the outlet for communicating a flow of gas there through; a turbine member journaled within the housing and disposed within the flow path for rotatably extracting mechanical power from the flow of gas; a gear train drivingly coupled with the turbine member; a drive shaft operably coupled with the gear train; and a decoupler, comprising: an output shaft extending axially between an output shaft first end coupled to the drive shaft and an output shaft second end configured to be operably coupled to and rotate with the engine, defining an interior including at least one output tab extending radially inward and at least one output slot extending radially outward, a connecting shaft extending axially between a connecting first end coupled to the drive shaft and a connecting second end located within the interior of the output shaft, a limiter cap comprising a limiting flanged end from which a hollow cap body extends operably coupled to the connecting second end of the connecting shaft, a locking shaft circumscribing the connecting shaft and including at least one locking tab axially engaged with the at least one output tab under a normal operating condition, a dog clutch having a dog flanged end and a hollow shaft extending axially from the dog flanged end, the hollow shaft circumscribing at least a portion of the limiter cap, the dog flanged end including at least one dog tab received within the at least one output slot of the output shaft under the normal operating condition. a housing defining an inlet, an outlet, and a flow path extending between the inlet and the outlet for communicating a flow of gas there through; a turbine member journaled within the housing and disposed within the flow path for rotatably extracting mechanical power from the flow of gas; a gear train drivingly coupled with the turbine member; a drive shaft operably coupled with the gear train; and a decoupler, comprising: an output shaft extending axially between an output shaft first end coupled to the drive shaft and an output shaft second end configured to be operably coupled to and rotate with the engine, defining an interior including at least one output tab extending radially inward and at least one output slot extending radially outward, a connecting shaft extending axially between a connecting first end coupled to the drive shaft and a connecting second end located within the interior of the output shaft, a limiter cap comprising a limiting flanged end from which a hollow cap body extends operably coupled to the connecting second end of the connecting shaft, a locking shaft circumscribing the connecting shaft and including at least one locking tab axially engaged with the at least one output tab under a normal operating condition, a dog clutch having a dog flanged end and a hollow shaft extending axially from the dog flanged end, the hollow shaft circumscribing at least a portion of the limiter cap, the dog flanged end including at least one dog tab received within the at least one output slot of the output shaft under the normal operating condition. an output shaft extending axially between an output shaft first end coupled to the drive shaft and an output shaft second end configured to be operably coupled to and rotate with the engine, defining an interior including at least one output tab extending radially inward and at least one output slot extending radially outward, a connecting shaft extending axially between a connecting first end coupled to the drive shaft and a connecting second end located within the interior of the output shaft, a limiter cap comprising a limiting flanged end from which a hollow cap body extends operably coupled to the connecting second end of the connecting shaft, a locking shaft circumscribing the connecting shaft and including at least one locking tab axially engaged with the at least one output tab under a normal operating condition, a dog clutch having a dog flanged end and a hollow shaft extending axially from the dog flanged end, the hollow shaft circumscribing at least a portion of the limiter cap, the dog flanged end including at least one dog tab received within the at least one output slot of the output shaft under the normal operating condition.