Built new in 1986 as a Short 360 and operated by Aer Lingus Commuter as EI-BSP and swedish Holmstrom Air (as SE-KXU) till 1998, the year it was converted to version C-23B+ for the US Army. The modification consists of replacing the single fin rear section of the Short 360 with the dual fin tail / cargo ramp of the Short 330. In total, 28 civilian Short 360 were converted to C-23B+ (N148Z being the last one), each receiving a new c/n. Thirteen C-23B+ ended up with the USFS, with 10 remaining operational at the time of upload. N148Z was modified to C-23C in 2013 (avionics upgrade).