Jeff Bonner Research & Development of San Antonio recently delivered the first four nacelle/cowling systems for the Nextant 400XT program by Nextant Aerospace. The Cleveland-based “re-manufacturing” company has 40 orders for its 400XT makeover of the Beechjet 400A/XP. The upgrade includes new Williams FJ44-3AP engines for which Nextant has placed an order with Bonner R&D for 15 nacelle/cowling assemblies.