 The upgrade puts the 250EP into the same weight class as the King Air 350, necessitating various system changes to meet certification requirements and a special rating for pilots.The United States Army, Air Force, Navy and Marine Corps have all flown versions of the Super King Air 200.As noted above some have been "off-the-shelf" civil versions, but the majority have been purpose-built for the military and were treated by Beechcraft and the FAA as a separate series, the A200 series.