波音737NG飞机引气系统作为飞机的重要系统直接影响着飞机空调、座舱增压、发动机和机翼的防冰。B737NG飞机引气剪刀差故障就是发动机引气系统出现性能衰减的初始表象并且经常被人忽视。本文通过分析典型的引气剪刀差故障,并在飞机缺少专用的引气测试设备时,提供快速的故障判断方法。 Boeing 737NG aircraft bleed air system as an important system of aircraft directly affects aircraft air conditioning, cockpit pressurization, engine and wing anti-ice. B737NG Poor air-to-air scissor failure is an initial manifestation of performance degradation in an engine’s bleed air system and is often overlooked. In this paper, we analyze the typical failure of air-entraining scissors and provide a quick method of fault diagnosis when the aircraft lacks a dedicated air-bleed test equipment.