It is a new way in the development of aircraft flight line maintenance expert system . expertise and fault isolation manual that help maintainers quickly find fault causes and failure components were adopted to a great extent 本研究充分利用维修专家的经验并结合飞机排故手册,帮助航线维护人员快速准确地根据飞机故障现象定位故障原因及故障部件。