A motoring system for a gas turbine engine comprising: a reduction gear train having an input and an output ; a motor operably connected to the input ; a clutch operably connected to the output , the clutch in operation engages and disengages the reduction gear train ; an accessory gearbox and a starter , wherein the clutch is operably connected to the accessory gearbox through the starter and an output shaft of the starter ; and a pinned mechanical fuse operably connecting the output to the clutch , the pinned mechanical fuse having at least one shear pin , the pinned mechanical fuse comprising: an outer sleeve having a first section , a second section , an inner chamber , an outer wall , and at least one through hole connecting the inner chamber to the outer wall within the first section ; and an inner sleeve having a first portion , a second portion , an outer surface , and at least one blind hole located in the outer surface within the second portion , the second portion being located within the inner chamber and operably connected to the outer sleeve through the at least one shear pin , wherein the at least one through hole is aligned with the at least one blind hole , wherein the at least one shear pin is secured within the at least one through hole and the at least one blind hole , and wherein the at least one shear pin in operation shears when torque on the pinned mechanical fuse is greater than or equal to a selected value. a reduction gear train having an input and an output ; a motor operably connected to the input ; a clutch operably connected to the output , the clutch in operation engages and disengages the reduction gear train ; an accessory gearbox and a starter , wherein the clutch is operably connected to the accessory gearbox through the starter and an output shaft of the starter ; and a pinned mechanical fuse operably connecting the output to the clutch , the pinned mechanical fuse having at least one shear pin , the pinned mechanical fuse comprising: an outer sleeve having a first section , a second section , an inner chamber , an outer wall , and at least one through hole connecting the inner chamber to the outer wall within the first section ; and an inner sleeve having a first portion , a second portion , an outer surface , and at least one blind hole located in the outer surface within the second portion , the second portion being located within the inner chamber and operably connected to the outer sleeve through the at least one shear pin , wherein the at least one through hole is aligned with the at least one blind hole , wherein the at least one shear pin is secured within the at least one through hole and the at least one blind hole , and wherein the at least one shear pin in operation shears when torque on the pinned mechanical fuse is greater than or equal to a selected value. an outer sleeve having a first section , a second section , an inner chamber , an outer wall , and at least one through hole connecting the inner chamber to the outer wall within the first section ; and an inner sleeve having a first portion , a second portion , an outer surface , and at least one blind hole located in the outer surface within the second portion , the second portion being located within the inner chamber and operably connected to the outer sleeve through the at least one shear pin , wherein the at least one through hole is aligned with the at least one blind hole , wherein the at least one shear pin is secured within the at least one through hole and the at least one blind hole , and wherein the at least one shear pin in operation shears when torque on the pinned mechanical fuse is greater than or equal to a selected value. <EOS>