Williams International

Williams International is a privately owned, vertically integrated maker of small gas turbine engines based in Pontiac, Michigan. Founded in 1955, it develops, tests, builds and supports turbine engines for commercial and military aerospace customers. Its best known products are the FJ33 and FJ44 turbofans that power many light business jets.

Products

• FJ33-5A: 1,850 lbf thrust, 319 lb
• FJ44-1AP: 2,100 lbf thrust, 468 lb
• FJ44-3: 3,000 lbf thrust, 516 lb
• FJ44-4: 3,600 lbf thrust, 670 lb

The FJ family uses a two-spool turbofan design with a dual channel FADEC, and all four models are in production. More than 8,400 FJ44 engines are in service with over 22 million flight hours.

Aircraft supported

Operators quoted on the site fly Williams engines on the Cirrus SF50 Vision Jet, Citation CJ2+, CJ3 and CJ4, and Pilatus PC-24. An FJ44-3 powered Steve Fossett's GlobalFlyer on its 2005 nonstop round-the-world flight.

Support

Product support is reached through a customer portal and a support line. The TAP Blue engine maintenance plan covers service bulletins and even foreign object damage repair.

Company facts

• Founded in 1955, privately owned
• Collier Trophy in 1978 and National Medal of Technology in 1995
• Supplier awards from Lockheed Martin, Northrop Grumman and Raytheon Missile Systems
• Gregg Williams inducted into the Living Legends of Aviation in 2022

Cirrus Vision Jet operators

Williams International's products page presents its FJ33 and FJ44 family of turbofan engines. The home page carries comments from operators who list the Cirrus SF50 Vision Jet among the aircraft they fly on Williams engines, alongside the Citation CJ2+, CJ3 and CJ4 and the Pilatus PC-24; one chief pilot writes that he has flown Williams engines on Citation CJ3s and now on the Vision Jet. Product support for these operators is reached through the customer portal and the product support contact listed on the site.