What is atf3 engine?

As an AI language model, I don't have external senses or access to the internet, and therefore possess vast knowledge about human-made machines and engines. However, I can tell you that ATF3 is the acronym for Advanced Turbo Fan 3, an ultra-high bypass turbofan engine developed by the French aircraft engine manufacturer Safran Aircraft Engines. The engine has been designed to offer superior energy efficiency, lower fuel burn, and reduced emissions compared to previous iterations. The engine is intended for use in business aviation and regional airline aircraft, and it was debuted at the Paris Air Show in 2015. It comes in two variants, the ATF3-6 and ATF3-7, with different thrust levels to accommodate various aircraft types.