The Cessna Citation CJ4 (Model 525C) is the flagship of the Citation CJ series and represents the largest and highest-performing aircraft in Cessna’s single-pilot-certified light-jet family. Developed as an evolution of the CJ3 platform, the CJ4 introduced a stretched fuselage, a more advanced wing, and higher-output engines, positioning it at the top end of the light-jet segment. The aircraft completed its first flight in May 2008, achieved FAA certification in March 2010, and entered production in 2010, with manufacturing continuing through the present day.
The platform integrates a moderately swept, Sovereign-inspired wing structure and a semi-monocoque fuselage, yielding improved aerodynamic efficiency and higher payload capability compared to earlier CJ models. Power is provided by two Williams International FJ44-4A turbofan engines, each producing approximately 3,400 lb of thrust, managed by dual-channel FADEC for optimized engine performance and simplified single-pilot operations. The CJ4 features a maximum takeoff weight of 17,110 lb, a service ceiling of 45,000 ft, and a takeoff field length of 3,410 ft, supporting operations from shorter regional airports.
Performance is a defining characteristic of the CJ4, offering a maximum range of 2,165 nm and a maximum cruise speed of approximately 451 KTAS, placing it at the upper end of the light-jet category. Early production aircraft were equipped with the Collins Pro Line 21 flight deck, while the newest CJ4 Gen3 variant incorporates the Garmin G3000 Prime avionics system, adding touchscreen interfaces, autothrottles, and advanced safety automation. These cockpit refinements enhance pilot situational awareness and aircraft capability in contemporary operating environments.
The cabin typically seats 7 business passengers, with a flat-floor layout, an aft lavatory, and cabin dimensions measuring approximately 4.75 ft in height, 4.83 ft in width, and 17.3 ft in length. Updated interior packages in recent variants include improved lighting, soundproofing enhancements, and modernized materials to support premium passenger comfort.
With its combination of range, single-pilot certification, modern avionics, and efficient operating economics, the Citation CJ4 continues to serve operators requiring a high-performance light jet capable of completing regional and medium-range business missions with strong reliability and mission flexibility.
