N500ZB

This airframe, registered N500ZB, is a Cessna S550 Citation S/II built in 1985 bearing serial number S550-0023. The current registered owner is FREGATA SYSTEMS LLC, an LLC based in Saint Louis, MO, US, and the aircraft carries a United States civil registration. No public record of prior ownership transfers or valuation was provided for this specific airframe. Condition and valuation details are not published.

The cabin for this specific S550 is outfitted in a typical 6–8 place executive layout, configured for small-group corporate transport and executive missions. Based in Saint Louis, MO, US under ownership of FREGATA SYSTEMS LLC, the aircraft’s performance figures—particularly its 1,998 nm range and 403 kt cruise speed—support coast-to-coast and regional transcontinental routings consistent with executive point-to-point operations. Avionics fit and specific interior finish details were not published for this airframe. Routine operation and maintenance planning for a 1985-built airframe such as S550-0023 would normally focus on engine program tracking for the two JT15D-4B powerplants and calendar/flight-hour structural inspections appropriate to its age and utilization.

This example of the Cessna S550 Citation S/II demonstrates the family’s mid-1980s design priorities: twin JT15D series turbofans delivering about 2,500 lbf each, a cruise near 403 kts, and a service ceiling of 43,000 ft paired with roughly 1,998 nm ferry capability for executive missions. Built as serial S550-0023 in 1985, the airframe represents an earlier-production S550 and thus may be subject to age-related maintenance and inspection considerations typical of jets of its vintage. Specific resale value and market demand indicators for this particular registered aircraft are not published.