Maintenance in aviation is one of the important factor related to the safety and efficiency of civil aviation, and is the base for flight as well. It is necessary to build an early warning expert system for maintenance errors in civil aviation. 机务维修是关系到民用航空安全和效益的重要因素之一,是飞行安全的基础,因此迫切需要建立航空机务维修差错预警专家系统。