Williams FJ44

The Williams FJ44 is Williams International's turbofan powering jet propulsion for airliners and business jets. First run in 1990, it is a mature, widely supported design. It produces 3,600 lbf of thrust.

The Williams FJ44 is a family of small turbofan engines widely used in light and very light business jets, offering high reliability in a compact and lightweight package. The FJ44 series spans thrust ratings from 1,900 to 3,600 lbf across multiple variants including the FJ44-1, FJ44-2, FJ44-3, and FJ44-4. It powers aircraft such as the Cessna Citation CJ series, Pilatus PC-24, and Sino Swearingen SJ30. Its applications include the Cessna Citation CJ1, Cessna Citation CJ2, Cessna Citation CJ3, Cessna Citation CJ4 and Pilatus PC-24 — and an engine's installed base matters commercially, because a widely flown type means deeper parts availability, more shop options and better residual liquidity.

For a turbofan, the commercial questions centre on fuel efficiency relative to the generation it competes with, the maturity of its support network, and — for any individual unit — its position in the shop-visit cycle, since a heavy shop visit is one of the largest single costs in aviation. When you compare quotes, insist on the engine's full history: cycles, shop visits, AD status and programme enrolment. HangarMart partners see current market pricing across conditions on request.