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 therethrough; 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 clutch having a drive shaft operably coupled with the gear train, and a thread insert operably coupled to the drive shaft, the thread insert comprising a threaded portion; and a decoupler, comprising: a tensile fuse having a first end operably coupled to the drive shaft, a threaded portion, and a neck portion having a reduced diameter located between the first end and the threaded portion; and an output shaft having a first end selectively operably coupled to the drive shaft, a second end configured to be operably coupled to and rotate with the engine, an exteriorly threaded portion of the first end, and an internal threaded portion that receives the threaded portion of the tensile fuse; wherein the threaded portion of the thread insert receives the exteriorly threaded portion of the first end of the output shaft; and wherein when a driving torque is transmitted from the drive shaft of the clutch to the output shaft the tensile fuse is not loaded, when an overrunning torque is transmitted below a certain level the tensile fuse is partially loaded and when the overrunning torque reaches a certain level the tensile fuse shears at the neck portion and the threaded portion of the tensile fuse is unwound from the internal threaded portion in a direction away from the drive shaft and the output shaft is unwound from the thread insert in a direction away from the drive shaft. a housing defining an inlet, an outlet, and a flow path extending between the inlet and the outlet for communicating a flow of gas therethrough; 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 clutch having a drive shaft operably coupled with the gear train, and a thread insert operably coupled to the drive shaft, the thread insert comprising a threaded portion; and a decoupler, comprising: a tensile fuse having a first end operably coupled to the drive shaft, a threaded portion, and a neck portion having a reduced diameter located between the first end and the threaded portion; and an output shaft having a first end selectively operably coupled to the drive shaft, a second end configured to be operably coupled to and rotate with the engine, an exteriorly threaded portion of the first end, and an internal threaded portion that receives the threaded portion of the tensile fuse; wherein the threaded portion of the thread insert receives the exteriorly threaded portion of the first end of the output shaft; and 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 clutch having a drive shaft operably coupled with the gear train, and a thread insert operably coupled to the drive shaft, the thread insert comprising a threaded portion; and a decoupler, comprising: a tensile fuse having a first end operably coupled to the drive shaft, a threaded portion, and a neck portion having a reduced diameter located between the first end and the threaded portion; and an output shaft having a first end selectively operably coupled to the drive shaft, a second end configured to be operably coupled to and rotate with the engine, an exteriorly threaded portion of the first end, and an internal threaded portion that receives the threaded portion of the tensile fuse; wherein the threaded portion of the thread insert receives the exteriorly threaded portion of the first end of the output shaft; and a tensile fuse having a first end operably coupled to the drive shaft, a threaded portion, and a neck portion having a reduced diameter located between the first end and the threaded portion; and an output shaft having a first end selectively operably coupled to the drive shaft, a second end configured to be operably coupled to and rotate with the engine, an exteriorly threaded portion of the first end, and an internal threaded portion that receives the threaded portion of the tensile fuse; wherein the threaded portion of the thread insert receives the exteriorly threaded portion of the first end of the output shaft; and wherein when a driving torque is transmitted from the drive shaft of the clutch to the output shaft the tensile fuse is not loaded, when an overrunning torque is transmitted below a certain level the tensile fuse is partially loaded and when the overrunning torque reaches a certain level the tensile fuse shears at the neck portion and the threaded portion of the tensile fuse is unwound from the internal threaded portion in a direction away from the drive shaft and the output shaft is unwound from the thread insert in a direction away from the drive shaft.