本文件定义了质子交换膜（PEM）燃料电池系统（FCS）、燃料（仅被认为是液体和压缩氢储存类型）、燃料储存、燃料分配和适当电气系统安全集成到飞机中的技术指南。 编者按:如今，PEM系统和燃料储存代表了最成熟的FCS技术，目前构成了该标准的基础。其他类型的燃料电池系统和燃料（包括重整技术和电解槽）可以由本文件的进一步更新涵盖。

This document defines the technical guidelines for the safe integration of Proton Exchange Membrane (PEM) Fuel Cell Systems (FCS), fuel (considered to be liquid and compressed hydrogen storage types only), fuel storage, fuel distribution and appropriate electrical systems into the aircraft. Editorial Note: Today PEM systems and fuel storage represent the most mature FCS technology and currently forms the basis for this standard. Other types of fuel cell systems and fuels (including reforming technologies and electrolyzers), may be covered by a further update to this document.