N609ST

This article covers airframe N609ST, a Gulfstream GIV-X (G450) built in 2009 with serial number 4153. The aircraft is registered in the United States and is owned by WILMINGTON TRUST CO TRUSTEE, a corporate trustee located in Wilmington, DE, US; ownership is recorded under that trust entity in the registry. The airframe's documentation identifies it as a fixed-wing multi-engine business jet with a reported market valuation of $11,500,000. Registry entries note the certification and seating configuration particulars for this specific serial, including seat-count declarations used for compliance and valuation.

Registry information for N609ST lists 22 seats, while typical executive outfitting for the type is usually 12–16 seats arranged in three cabin zones (forward/center/aft); the registry entry therefore reflects a maximum seating declaration rather than a single interior layout. The avionics fit for this airframe is listed as Honeywell Primus Epic / PlaneView, supporting modern integrated flightdeck capabilities. Typical missions for this airframe and configuration would encompass long-range executive transport given its 4,350 nm range and high cruise speed, with operations conducted under U.S. registration and corporate trust ownership oversight. Maintenance and operational considerations for this specific aircraft follow Gulfstream and Rolls‑Royce maintenance programs appropriate to the G450/Tay combination and the aircraft’s documented configuration.

The Gulfstream GIV‑X (G450) occupies the long-range large-cabin business jet niche, offering transcontinental and intercontinental capability with a cruise near 459 kts and a service ceiling of 45,000 ft. Competing models in the segment typically include late-model large-cabin jets from Bombardier and Dassault; buyer and charter demand for this family has historically favored certified reliability, cabin comfort, and avionics like the Honeywell Primus Epic / PlaneView suite. Resale and maintenance considerations for this airframe are influenced by its build year (2009), engine type (Rolls‑Royce Tay Mk 611‑8C), and the declared seating and condition that underpin the listed value of $11,500,000.