本SAE航空航天推荐规程（ARP）描述了当适用规范要求污染物不再循环时，使用污染空气进行耐久性试验的方法。测试的目的是确定发动机安装部件对污染空气造成的磨损或损坏的抵抗力。 本文所述的方法要求污染物不再循环，并且旨在在被测单元(UUT)的入口处提供污染物的均匀分布。 UUT可能需要使用液压流体来致动测试单元内的部件。测试液压油的污染不属于本推荐实践的一部分。如果适用的试验规范要求使用受污染的液压油，请参阅MAP749。

This SAE Aerospace Recommended Practice (ARP) describes a method of conducting an endurance test using contaminated air when the applicable specification requires non-recirculation of the contaminants. The objective of the test is to determine the resistance of the engine mounted components to wear or damage caused by the contaminated air. The method described herein calls for non-recirculation of the contaminants and is intended to provide a uniform distribution of the contaminant at the inlet to the Unit Under Test (UUT). The UUT may require the use of a hydraulic fluid for actuation of components within the test unit. Contamination of the test hydraulic fluid is not part of this recommended practice. If contaminated hydraulic fluid is required by the applicable test specification, refer to MAP749.