Learjet 31

Learjet 31
Alan Radecki · CC BY 2.5 · source
Name	Learjet 31
Type	Business jet
Manufacturer	Learjet Inc.
First flight	1988
Introduced	1989
Status	Retired / limited service

Learjet 31 is a small, high-performance business jet developed in the late 1980s by Learjet Inc. and produced under Bombardier Aerospace ownership. It was designed to blend the speed and climb performance of earlier Learjet 35 derivatives with improved avionics and single-pilot certification to appeal to corporate operators such as NetJets, General Dynamics, and charter firms operating from hubs like Teterboro Airport and Van Nuys Airport. The type was frequently compared with contemporaries from Cessna and Gulfstream Aerospace and served private, corporate, and government roles across North America, Europe, and Asia.

Development and design

The development program began after Bill Lear's founding company evolved into Bombardier Aerospace's light-jet portfolio alongside models like the Learjet 35A, Learjet 55, and Learjet 60. Design goals included high cruise speed comparable to Learjet 35A and enhanced single-pilot capability favored by operators such as NetJets and Executive Jet Aviation. Airframe changes incorporated aerodynamic refinements influenced by research at institutions like NASA and aerodynamicists linked to McDonnell Douglas projects. The cockpit integrated avionics suites from suppliers with contracts for systems used on types like the Gulfstream IV and Hawker 800, enabling certification processes overseen by authorities including the Federal Aviation Administration and Transport Canada. Engines were selected from manufacturers with histories supplying business jets to Bombardier Aerospace and Cessna fleets.

Specifications

Basic dimensions and performance figures were published alongside competing models such as the Cessna Citation II, Beechcraft King Air, and Gulfstream American GA-7. Typical specifications included a pressurized cabin sized for corporate missions out of airports like London Luton Airport and Charles de Gaulle Airport, with maximum cruise speeds comparable to transcontinental services between New York JFK Airport and Los Angeles International Airport. Avionics packages paralleled systems fitted to aircraft operating in fleets like NetJets and Fractional ownership programs administered by FlightSafety International. The powerplants and fuel capacity supported climb profiles used in standard procedures at airfields including Chicago O'Hare International Airport and Dallas Love Field.

Operational history

The type entered service during a period of expansion for corporate aviation, competing with derivatives from Cessna and Dassault Aviation as business aviation demand surged in financial centers such as Hong Kong and London. Operators included charter companies operating flights to destinations like Nairobi and Doha, and government agencies using the type for liaison duties in regions including Europe and North America. The aircraft participated in demonstrations at air shows such as the Farnborough Airshow and NBAA Business Aviation Convention, joining displays alongside types from Bombardier Aerospace, Embraer, and Dassault Aviation. Maintenance and support were provided by approved centers connected to suppliers servicing fleets at facilities like Boeing Field and Miami-Opa Locka Executive Airport.

Variants

Several configurations evolved to meet operator demands similar to how Gulfstream Aerospace and Cessna adapted their light jets. Corporate, medevac, and special mission conversions paralleled conversions available for models like the Learjet 35A and Beechcraft 1900D, and aftermarket modifications were offered by firms with contracts comparable to those held by FlightSafety International and StandardAero. Some airframes received updated avionics comparable to retrofits found in fleets from NetJets and military liaison aircraft operated by ministries in Canada and Germany.

Operators

Civil operators ranged from charter companies and fractional providers similar to NetJets and Flexjet to mission-specific users associated with institutions such as NASA test programs and corporate flight departments at multinational firms based in Zurich and Singapore. Government and state operators included agencies in countries across Europe, Asia, and South America that used small jets for executive transport and liaison tasks. FBOs at airports like Teterboro Airport and Van Nuys Airport commonly handled ground support and passenger services for this class of aircraft.

Accidents and incidents

Accident records for this type were maintained by authorities including the National Transportation Safety Board, Transportation Safety Board of Canada, and counterparts in Europe. Investigations often referenced procedures and safety measures promulgated after incidents involving similar low-wing business jets from manufacturers such as Learjet Inc., Cessna, and Hawker Siddeley. Findings sometimes led to service bulletins issued by maintenance organizations affiliated with suppliers used by operators in fleets like NetJets and corporate departments at firms headquartered in New York City and London.

Category:Business jets