N657DJ

This airframe, registered as N657DJ, is a Gates Learjet Corp-built Learjet 55 (Longhorn) completed in 1983 with manufacturer's serial number 094. The airframe is owned by CASTIRON 5 LLC, a Wilmington-based limited liability company designated in the registry as CASTIRON 5 LLC of Wilmington, DE, US, and carries a United States registration (US). Registry entries note a high-density certification option and list 13 seats on the current record, a detail that has appeared in registry actions documenting interior configuration changes. Current market valuation for this specific aircraft is recorded at $1,500,000, reflecting age, configuration and typical maintenance status for the model and serial.

The listed cabin configuration for N657DJ is a typical executive club layout seating seven to eight passengers, though the registry entry documents 13 seats indicating a high-density arrangement is possible. Avionics for this airframe are recorded generically as Collins-family suites with common fitment of FMS upgrades across the model line; a specific detailed avionics fit for this serial is not published. Operationally the Learjet 55 long-range, high-speed profile supports charter, executive shuttle and owner-flown interstate missions roughly up to the stated 2,244 nm range at cruise speeds near 420 kts, typically operated from its owner’s home base in the Wilmington, Delaware area. Maintenance considerations align with mid-life inspection cycles and support for the TFE731 turbofan series.

The Learjet 55 (Longhorn) occupies a mid-size, medium-range niche within the light-to-midsize business jet market, offering high cruise speed and a 51,000 ft service ceiling that remain competitive for point-to-point regional operations. Competing types include later-generation light midsize jets that trade some cruise and ceiling performance for improved cabin volume and modern avionics. Buyer and charter demand for older Learjet 55 airframes typically emphasizes price, available interior configurations (owner executive vs. high-density), and remaining engine and calendar-life on major components; such factors are reflected in the stated $1,500,000 valuation. Maintenance and resale considerations for this serial include the common aftermarket for TFE731 support and costs associated with avionics modernization where Collins-family equipment and FMS upgrades are frequently retrofitted.