ASTM F3239-22 PDF Download

ASTM F3239-22 is a standard specification that outlines the airworthiness requirements for the design and installation of electric propulsion systems for airplanes. It also implicitly addresses hybrid-electric propulsion systems, unless stated otherwise. The focus of this specification is on electric propulsion systems with conventional layout, propulsion characteristics, and operation. However, the content may have broader applicability, and it is the responsibility of the applicant to substantiate this broader applicability as a specific means of compliance.

If an applicant intends to propose this information as a means of compliance for a design approval, they must seek guidance from their respective oversight authority, such as published guidance from applicable Civil Aviation Authorities (CAAs), regarding the acceptable use and application of the standard. The standard provides a reference to Annex A1, which maps the means of compliance described in this specification to EASA CS-23 (amendment 5 or later) and FAA 14 CFR Part 23 (amendment 64 or later). This allows the applicant to understand how the standard aligns with the regulatory requirements of different oversight authorities.