Consultation expired with comments. The proposed Certification Memorandum (CM) has been updated based on the comments received, and the corresponding Comment-Response Document (CRD) has been completed by EASA.
Details
Identification of issue
Electric/Hybrid Propulsion Systems (EHPS) use electrical propulsion technologies that are sometimes combined with traditional thermal propulsion Engines in various ways.
An EHPS may include, but is not limited to, electric Engines, turbine Engines, piston Engines, generators, electrical power generation, distribution, wirings, propulsion battery system, integrated fans, cooling systems, controllers, and power management systems.
The highly integrated Aircraft systems, including powerplant, already present certification challenges to properly address the boundaries between Aircraft, Engine and Propeller. The new technologies introduced in EHPS make these challenges more complex and sometimes question the applicability of traditional methods as used for certification of legacy technologies.
The purpose of this CM is to provide guidance to applicants on type certification approaches which may be considered for an EHPS, including the perimeter of the “Engine” as a product.