The steelfuselage, simplestructure, smallsize, light weight, largecapacitymade it easy to operate. It is widely used in the qualitativeanalysisofblood and urea.
At the same time, Learjet was working on the Learjet 45, a totally new fuselage design, which would also target the light jet buyer seeking more range and cabin size together with operating costs less than a typical midsize aircraft.