A clean-sheet business jet combining classic Learjet performance with a larger cabin, flat floor, and modern systems designed for efficient regional and cross-country transportation.
Aircraft Photo by cristian
The Learjet 45 marked a generational change for Learjet. Earlier models had progressively developed the architecture that began with the original Lear 23; the 45 was a clean-sheet aircraft, designed around a larger cabin, new wing, modern systems, and more efficient manufacturing. It retained the speed, climb performance, and handling associated with the Learjet name while creating a substantially different passenger and ownership experience.
That distinction gives the 45 an interesting position in the market. It offers eight-passenger double-club seating and a flat-floor cabin without moving into a substantially larger business jet, while its TFE731 engines preserve strong high-altitude performance. The Citation Excel offers a larger cabin with a different performance balance, while the Citation CJ4 represents a smaller and more efficient alternative for missions that don’t require the Learjet’s cabin size.
Announced in the early 1990s, the Learjet 45 was the first clean-sheet Learjet since the original Model 23. It first flew in 1995, received FAA certification in 1997, and entered service in 1998. The new design introduced an oval fuselage, flat cabin floor, new wing, trailing-link landing gear, brake-by-wire, digital engine controls, and Honeywell Primus 1000 avionics. Twin Honeywell TFE731-20 engines provided the performance expected of the brand while the redesigned cabin addressed many of the compromises associated with earlier Learjets.
444 kts
1,997 nm
21,500 lbs
Source: Published performance figures from Vref (2021 Vol. 4). Unless otherwise noted, figures represent the base production model. Actual performance varies by variant, configuration, and operating conditions.
The Learjet 45 is suited to corporate, private, and charter operations carrying moderate passenger loads over regional and cross-country distances. Its eight-seat double-club cabin gives it more passenger utility than earlier compact Learjets, while the aircraft retains the speed and altitude capability expected from the family. Individual aircraft condition, engine status, avionics configuration, and maintenance history become increasingly important as the fleet ages.
The original Learjet 45 established the clean-sheet platform with an oval fuselage, flat-floor cabin, Honeywell Primus 1000 avionics, and TFE731-20 engines. Its new wing and systems architecture separated the aircraft technically from the earlier Learjet family despite retaining the familiar exterior character. The cabin was designed around eight passengers in a double-club arrangement with an aft lavatory and external baggage compartment. This variant established the modern Learjet platform that later supported the 40, 45XR, 70, and 75.
The 45XR added TFE731-20BR engines and a higher maximum takeoff weight, improving climb, cruise, and hot-and-high performance. Interior changes provided additional passenger space and storage, while updated flight-management equipment refined the cockpit. Bombardier also provided a path for existing Learjet 45s to receive many of the XR improvements through service bulletins. The XR became the mature development of the 45 before production transitioned to the Learjet 75.
The Learjet 45 is strongest on regional and cross-country missions where its combination of speed, altitude capability, and eight-passenger cabin can be used effectively. Typical cruise occurs in the mid-40s at roughly Mach 0.78 to 0.80, with a certified ceiling of FL510. Payload and fuel require planning on longer missions; the aircraft was not generally a fill-the-seats, fill-the-tanks platform, although the XR improved that balance.
Honeywell Primus 1000 integrated avionics introduced a four-screen electronic cockpit with EICAS, flight management, weather radar, and digital systems integration that represented a major departure from earlier Learjet flight decks.
Twin Honeywell TFE731-20 turbofans provide 3,500 pounds of thrust per side, with digital electronic engine controls simplifying power management. The 45XR’s -20BR engines improve performance, particularly under hot-and-high conditions.
Fleet upgrades include modernized flight-management capability, WAAS navigation, connectivity, and other avionics improvements that can substantially affect the utility of individual aircraft.
The flat-floor cabin is typically arranged with eight seats in a double-club configuration, complemented by an aft lavatory, galley or storage areas, and a 50-cubic-foot external baggage compartment.
The TFE731-powered fleet benefits from an established engine support environment, while aging-aircraft inspections, component status, avionics support, and aircraft-specific maintenance history increasingly influence long-term mission readiness.
Fast regional and cross-country transportation for corporate, private, and charter operations requiring midsize cabin utility without moving into a larger business jet.
The Learjet 45 represents one of the clearest dividing lines in Learjet’s history. Its clean-sheet airframe preserved the performance character of earlier models while addressing their most persistent limitations through a larger oval fuselage, flat floor, improved baggage capacity, and modern systems architecture. The 45XR further developed that foundation with better performance and payload capability. The result is a Learjet that carries the identity of the earlier family while delivering the cabin and operating environment of a substantially newer generation.
Aircraft commonly cross-shopped for similar missions or ownership priorities.
KTYR
Tyler Pounds Airport
309 Airport Drive
Tyler, Texas 75704
(903) 705-4523
Mailing Address
PO Box 663
Bullard, TX 75757
Based in Texas. Serving aircraft owners nationwide.
© 2026 HX Aviation, LLC