本SAE航空航天信息报告（AIR）讨论了空气在飞机液压系统中可能采取的形式。此外，还讨论了各种空气形式对系统运行的影响。提供了防止空气影响的推荐系统设计以及防止和排除空气的维护程序。蓄能器中的氮气泄漏也是液压系统中的气体来源，可能构成液压系统中“空气”的一部分。本报告中的术语“空气”不区分严格由正常大气空气构成的气体，也不区分包含额外氮气混合物的气体。 本报告的讨论同样适用于系统中任何比例的大气和氮气。

This SAE Aerospace Information Report (AIR) discusses the forms that air may take in aircraft hydraulic systems. Further, the effects of the various air forms on system operation are addressed. Recommended system design to prevent air effects and maintenance procedures to prevent and remove air are provided. Nitrogen leakage from accumulators is also a source of gas in hydraulic systems and may compose a portion of the "air" in the hydraulic system. The term "air" in this report does not differentiate between a gas composed strictly of normal atmospheric air or one that includes a mixture of additional nitrogen as well. The discussions of the report apply equally with any proportions of atmospheric air and nitrogen in the system.