The Beechcraft C-90 “King Air” is a twin turboprop aircraft operating under a Standard Airworthiness Certificate. It is capable of carrying up to five passengers with a crew of two. Its two Pratt & Whitney PT6A-20 engines produce 550 SHP. The King Air has a maximum takeoff weight of 9,650 lbs. NTPS uses the King Air for Performance and Flying Qualities flight test instruction.