The GEK800 turbofan, jointly developed by GE Aerospace and Kratos Defense & Security Solutions, has been assigned the US military engine type designation F143-ZZ-100 and has been awarded a US Air Force contract for engineering, manufacturing, and development (EMD) as a second-source propulsion system for the Joint Air-to-Surface Standoff Missile (JASSM). Neither company disclosed the value of the contract, its duration, or a target production d…