基于航后QAR数据译码的APU故障诊断技术

Study of Post Flight QAR Data Decoding in Fault Diagnosis of APU

摘要:

APU系统由于其会直接影响飞机的运行安全性、经济性以及旅客的舒适度,因此无论是飞机主制造商还是航空公司都非常重视APU系统的故障诊断工作;但是,在APU设计之初又无法实现对其所有故障的准确探测和隔离;为了实现飞机投入运营后对APU系统疑难故障的探测问题,文章以B737飞机的APU启动电门故障以及APU启动时间异常为例,提出利用航后的QAR相关数据译码结果,查看相关参数的变化情况,提高APU系统的故障诊断水平;实践证明,利用航后QAR数据译码结果能够极大提高航空公司对APU系统以及飞机的故障诊断水平,方便航空公司日常的运营和维护工作,最终提高飞机的利用率。

Abstract:

Due to the direct influences to the aircraft operation safety, economics and customer comfortability, both airframers and airliners pay much attention on the fault diagnosis of APU sytsem. But during the design process of APU, it is impossible to detect and isolate all of the faults or failures. So, in order to solve the detection issue of complicated APU faults, taking start button fault and abnoraml start time of B737 as two examples, this article intend to propose the application of post flight QAR data decoding, which can enable maintenaners to review continuous change of APU related parameters.Then fault diagnosis level of APU can be raised. Practices has proved that, with the help of post flight QAR data decoding results, the fault diagnosis level of APU and aircraft wil be enhanced, the airliners’ operation and maintenance will be faciliated, and finally utilization of the fleet will be promoted.