N309KB

This entry documents airframe N309KB, a Bombardier CL-600-2B16 Challenger 604 built in 1999 with manufacturer serial number 5418. The aircraft is owned by '1637 N WARSON AVIATION LLC', an LLC based in St Louis, MO, US, and is registered in the US; the St Louis location functions as the operator/home base for this airframe. Registry records indicate standard U.S. registration actions associated with corporate ownership, and current market valuation for this specific airframe is recorded at $5,000,000, reflecting its age, configuration, and typical condition for the model year.

The airframe is outfitted with a typical executive cabin arranged for 10–12 passengers in a double-club / forward club & divan layout while retaining a certificated maximum seating of 22, matching its corporate transport role. Avionics are fitted with Collins Pro Line 4, with the possibility of operator-specific upgrades; this fit supports long-range executive missions and IFR operations to higher-altitude airways. With a 4,000 nm range and a cruise speed of 459 kts, the aircraft is capable of transcontinental and many intercontinental city-pair missions from its St Louis base. Maintenance considerations center on airframe age (built 1999) and the CF34-3B engine type, which influence inspection cycles and component tracking for continued corporate use.

Within its class, this Bombardier CL-600-2B16 Challenger 604 airframe combines long-range capability (4,000 nm), a relatively high cruise speed (459 kts), and a high certificated seating capacity (22), positioning it for sustained demand in owner/operator and charter markets seeking large-cabin executive transports. The airframe’s 1999 build year and current valuation of $5,000,000 are key factors for prospective buyers and operators evaluating maintenance reserves, avionics upgrade paths (Collins Pro Line 4), and resale prospects.