介绍了737-800飞机温度控制活门的一种特殊故障模式,这种故障模式下PZTC和CPC自检都不会记录任何故障信息,波音的故障隔离手册上也没有适合的隔离方法。通过对系统工作原理和故障的分析,给出了一个行之有效的隔离方法,有效避免因选错方向而导致的大量部件误拆误换。 A special failure mode for the 737-800 aircraft temperature control valve is described. No fault information is recorded by both PZTC and CPC self-test in this fault mode and there is no suitable isolation method in Boeing’s fault isolation manual. Through the analysis of the working principle and fault of the system, an effective isolation method is given, which can effectively avoid a large number of parts from being wrongly disassembled and removed due to the wrong direction.