N599RM

This article describes airframe N599RM, a 1979-built Cessna 501 Citation I/SP manufactured by Cessna Aircraft Company with serial number 501-0099. The airframe is registered in the US and is owned by AVIATION RESOURCE GROUP LLC of Denver, CO, US, which appears as the primary operator and home-base contact in registry records. Acquisition and continued operation by the LLC frame the recent history of the jet, and a noted cabin update completed in 2016 is recorded. The aircraft carries a market valuation listed at $495,000, reflecting its age, configuration and equipment fit.

The certified cabin arrangement for N599RM is an executive five-to-eight passenger layout detailed as a forward barrel seat, a mid-cabin four-place club, and an aft belted lavatory; this interior was updated in 2016. Avionics on the airframe include a Sperry SPZ-500 IFCS, dual Garmin 430s, a Bendix RDR-1100 weather radar and a Shadin Air Data Computer, supporting typical single-pilot or two-pilot IFR operations. With a range of 1,328 nm and cruise near 352 kts, the aircraft is well suited to short-to-medium business missions and owner-operator regional transport from its Denver, Colorado base. Maintenance considerations tied to older JT15D powerplants and legacy avionics integration are likely factors for continued operational planning and potential retrofits.

The Cessna 501 Citation I/SP occupies a light business jet niche characterized by modest operating costs and runway performance for its era. Competing models historically include other late-1970s light jets offering similar mission profiles; buyer and charter demand tends to favor well-equipped, updated interiors and modern avionics suites. For this airframe, the 2016 cabin refresh and retained avionics package support utility in the used market, but its age, JT15D engine type and valuation at $495,000 will make maintenance history and logbook completeness key determinants in resale or continued charter use.