Fairchild C-26 Metroliner
The Fairchild C-26 "Metroliner" is the Fairchild Swearingen Metroliner series twin turboprop aircraft in the service of the United States military. It was not officially named by the US Armed Forces, but is unofficially known by the same name as its civilian counterpart.
Source: Wikipedia — Fairchild C-26 Metroliner (CC BY-SA 4.0)