针对民用飞机系统出现手册和案例之外的新故障的诊断和维修排故，以解决分布式多源信息集成、基于模型与基于手册的综合诊断排故、诊断排故效率和效果等问题，基于系统原理、系统可靠性设计数据、维修排故技术手册，研究一套集测试性分析、故障诊断、维修排故于一体的诊断排故理论和方法体系。创立基于系统原理的故障传播机理分析策略，提出与建立测试-故障-维修（TFM）三维空间信息流模型，建立基于故障的面向过程的手册关联矩阵和信息推送算法、基于TFM三维空间信息流模型的模糊关联诊断推理算法，提供模型诊断排故的测试性分析和评估方法，研制民用飞机系统诊断排故软件系统并完成应用和验证。研究成果可为新研制飞机运行早期的诊断排故、手册完善和可靠性设计优化提供理论方法，实现确保民机运行的安全性和可靠性。

A set of theory and methodology on fault diagnosis and troubleshooting for testability analysis, fault diagnosis, and maintenance troubleshooting is explored by carrying out fault propagation analysis on system theory. It is provided for diagnosis and troubleshooting of new fault to mannual and cases of civil aircraft system. Trough system theory analysis, fault propagation mechanism is produced. To solve the problems of information integration of distributed multi-source, a test-failure-Maintenance (TFM) three-dimensional space information flow modeling method is proposed. To realize model-based and manual-based integrated pragnosis, fault-based and process-oriented manual correlation matrix and information push algorithm are established. To advance the efficiency and effectiveness of diagnosis and troubleshooting, a fuzzy association diagnostic reasoning algorithm based on the TFM information flow model is set up, and a testy analysis and assessment methods is provided. Finally, a civil aircraft system diagnostic troubleshooting software system is developed to verify the feasibility of the above methods. The proposed theory and methodology are useful for newly developed aircraft during its early operation in fault diagnosis and troubleshooting, manual improving, and reliability design optimization, and ensure the safety and reliability of civil aircraft operation.