Europrop International | 8,377 followers on LinkedIn. TP400-D6 engine: committed to Mission Success! | Europrop International GmbH (EPI) is responsible for the TP400-D6 turboprop engines design, development, manufacturing and support. Produced to power the Airbus A400M Military Transport Aircraft built by Airbus Defence and Space, the TP400-D6 is the most powerful engine in production. Consisting of a European collaboration programme between ITP, MTU Aero Engines, Rolls-Royce and Safran Aircraft Engines, Europrop International combines the best of Europe’s aerospace companies’ resources and expertise.