Emirates has achieved another major milestone by becoming the first airline to successfully complete ground engine testing of a GE90 engine on a Boeing 777-300ER, using 100% Sustainable Aviation Fuel (SAF). Emirates tested both biokerosene and hydrotreated vegetable oil (HVO) fuels, both of which contain SAF. With the capability demonstrated, Emirates is now in a position to utilize this fuel to reduce their carbon emissions by up to 80% over the fuel's life cycle. The special blend of SAF with no modifications needed for the purpose not only strengthens Emirates’ sustainability prowess but also helps lay importance on its commitment towards providing safe and secure operations for its travelers. Emirates recently made history with the completion of a successful ground test run of an aircraft engine running on Sustainable Aviation Fuel (SAF) for the airline's first experimental test flight. Emirates commissioned the testing activities to compare specific outputs under each fuel type, analyse performance and behavior of the fuel system, and ensure a seamless takeoff due to take place this week. The success of this test is a considerable milestone in Emirates’ ambitious goal of significantly reducing carbon emissions and making air travel more sustainable. Emirates has made strong advances and commitments in seeking to lead innovation in sustainable aviation, meaning that this historic event is likely just the beginning of incredible steps being taken toward global sustainability efforts. Emirates Engineering Centre in Dubai handled the ground testing process with expert precision. The aircraft was inspected and went through the necessary prerequisites before beginning its stationary operation. The Honeywell 331-500 auxiliary power unit (APU) came to life at 100% SAF, ready to ignite the engines. Emirates experts then put this power unit under full load and set it off along a flight profile journey, starting with a left engine exercise that incorporated idle, 'take-off' and 'climb settings' simulated in full duration; running both fast and furiously at maximum speed. Finally, 'cruise' speeds were conducted for 15 minutes before cooling down the engines and isolating their fuels again for safety purposes. Emirates has created a remarkable state-of-the-art engineering centre filled with avant garde equipments allowing them to perform such tests with ease each and every day. Emirates has taken a bold step towards green aviation by signing a Memorandum of Understanding (MoU) with GE Aerospace and Boeing at the 2021 Dubai Airshow to develop a programme for conducting a test flight using 100% Sustainable Aviation Fuel (SAF), on Emirates 777-300ER aircraft powered by GE90 engines. This advanced aircraft will take off the ground with more than 20 years of ground testing, technical analysis, operational requirements, and collaboration between Emirates’ partners Honeywell, Neste, Virent Inc., and Marathon Petroleum Corp. Emirates is confident that this new SAF blend won't compromise on the performance seen from traditional jet fuel and believe it is a hugely significant step in delivering more sustainable aviation. Emirates continues to push the boundaries of sustainability with their latest initiative concerning synthetic fuel (SAF) blends and biofuels. This project aims to further research and data on the components of SAF, paving the way for eventual approval and standardization of 100% drop-in SAF usage in all Emirates flights. After conducting a successful trial with one engine, Emirates plans to team up with aircraft and SAF providers in order to eventually certify these blends for commercial flight use, expanding beyond their current limitations of max 50% blending. Through this venture Emirates hopes to improve their current level of environmental friendliness and reduce emissions from flight operations even more.