N451SJ

This article concerns airframe N451SJ, a factory-built Learjet 45 completed in 2001 with serial number 45-173. The airframe was manufactured by Learjet Inc (Bombardier Aerospace) and is registered in the US. Ownership is recorded to Southern Cross Aircraft LLC, a corporate owner based in Fort Lauderdale, FL, US, which serves as its operator/home base in available records. The airframe carries an assessed value of $2,223,793, reflecting its age, equipment fit and market position at the time of valuation.

The cabin of N451SJ is fitted in a flat-floor executive layout configured for two flight crew plus 8–12 passengers in a double-club arrangement, featuring an enclosed aft lavatory and internal baggage space consistent with the model standard. Typical avionics fit for this airframe is the Honeywell Primus suite, as is customary for Learjet 45s, supporting precision navigation and flight management for business and charter operations. Based at Fort Lauderdale, FL, US under Southern Cross Aircraft LLC, the aircraft's profile and range of 1,971 nm support short- to medium-range point-to-point corporate missions and on-demand charter flights. Maintenance considerations are typical of late-model Learjet 45 airframes, with attention to twin TFE731-series engine program requirements and avionics lifecycle for the Honeywell Primus suite.

The Learjet 45 occupies a light business jet niche offering high cruise speeds and high-altitude capability, exemplified here by a cruise of 445 kts and service ceiling of 51,000 ft, while seating up to 12 in executive configurations. Competitively, this model targets corporate and charter operators seeking fast stage lengths under 2,000 nm; resale and maintenance considerations often hinge on engine time, avionics condition, and interior configuration. For this specific airframe, the recorded value of $2,223,793 and corporate ownership in Fort Lauderdale frame its appeal to regional operators balancing operational performance with lifecycle costs.