N9ZB

The airframe bearing registration N9ZB is a 1978-built Cessna 501 Citation I/SP with serial number 501-0047, manufactured by Cessna (Textron Aviation). It is recorded as owned by INTERNATIONAL AIR SERVICES INC TRUSTEE, a corporate trustee based in Carson City, NV, US, and is registered in the US. The airframe’s listing information and modern avionics retrofit have been noted in sales and registry entries, and it carries an estimated market value of $1,095,000. The aircraft’s trustee ownership and documented retrofit history are the principal notable ownership details available for this specific airframe.

This individual Citation I/SP is reported in listings to have a 5-passenger cabin layout comprised of a four-place club configuration plus a forward barrel seat while the aircraft holds an overall seating capacity of 8. The avionics fit, as detailed in listings for this airframe, includes dual Garmin G600 TXi PFD/MFD, a Garmin GTN 750 NXi, Garmin GWX-75 weather radar, ADS‑B In/Out capability and an SPZ-500 autopilot, reflecting a modernized cockpit for situational awareness and single-pilot or two-pilot operation. Typical mission profiles for this airframe align with light business transport and short to mid-range corporate hops, leveraging a cruise speed of 380 kts and an endurance consistent with a 1,800 nm range. Maintenance considerations for this specific example would include JT15D engine support and avionics integration checks following retrofits.

The Cessna 501 Citation I/SP occupies the light-corporate twinjet niche as an early Citation derivative offering transcontinental capability in some configurations with a high single-engine reliability reputation. Competing models historically include light jets from Learjet and early Gates/Beechcraft offerings; buyer demand for well-equipped, refurbished older Citations remains steady among cost-conscious owner-operators and smaller charter operators. Resale and maintenance considerations for this airframe emphasize JT15D-4 engine overhaul cycles, the airframe’s age (built 1978), and the value impact of the documented avionics suite and interior configuration on marketability.