Within the framework of ACARE (Advisory Council for Aeronautics Research in Europe), Safran Engineering Services is working on several projects regarding EWIS (Electrical Wiring Interconnection System) issues. It is presently coordinating the European research project named “TAUPE” (Transmission in Aircraft on Unique Path wirEs), the objectives of which are to reduce the weight of the wiring and to simplify the wiring system as well as its maintenance. The internal Safran work programme's goal is to demonstrate a high rank maturity for two technologies: Power Line Communication (PLC) on the one hand and Power over AFDX (PoAFDX) on the other hand. This research action was launched in 2008. Results obtained are presented here after.