The Nextant 400XT is a thoroughly remanufactured Beechjet 400A, rebuilt by Nextant Aerospace with Williams International FJ44-3AP engines and a Collins Aerospace Pro Line 21 avionics suite to deliver a modern ownership experience at a fraction of the cost of a comparable new aircraft. The engine replacement alone represents a meaningful step forward in reliability and operating efficiency over the original JT15D turbofans, while the Pro Line 21 brings integrated displays and WAAS/LPV capability to a cockpit that previously had neither. The remanufacturing process addresses airframe and systems lifecycle items throughout, giving buyers a level of mechanical confidence that a standard pre-owned purchase cannot match. For operators seeking near-midsize performance with modern avionics at a favorable acquisition cost, the 400XT makes a compelling case.