11/30/2010. This helicopter was produced for the US Army as an OH-6A under the military serial 68-17358. Subsequently it was converted to an EH-6B electronic surveillance version with a 400 shp Allison 250-C20 engine. Later it became one of 23 MH-6B attack conversions for the Special Forces, fitted with external weapons mountings for two 0.30 in (7.62 mm) miniguns, FLIR (Forward Looking Infra-Red) sensor, etc.
Struck off charge, it was registered to the US Department of Homeland Security as N5187Y on May 13, 1996, and has since been operated by the US Border Patrol. N5187Y is accompanied at Alpine by a second Cayuse, N6639W (former US Army s/n 66-17811).