GE Aviation has recently completed successful testing of its Passport long-range business aviation engine using 100% Sustainable Aviation Fuel (SAF), a lower carbon alternative jet fuel. The Passport engine can now operate on approved SAF, and the recent testing shows the capability of the engine to run on 100% SAF. It was the first time the Passport engine was tested with 100% SAF. Currently, SAF approved for use is a blend of petroleum-based Jet A or Jet A-1 fuel and a SAF component with a maximum blend limit of 50%. ASTM International, an organization that develops technical standards, has not