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Aircraft maintenance simulator has been extensively applied to maintenance training for aviation companies and universities,as it can accomplish comprehensive maintenance practice.Maintenance simulator includes a series of complex maintenance model like fault ,working principle and operation, efficiency and training effectiveness of maintenance simulator is directly related to its structure.According to the disunion of the designs of model structure,abundance of categories,with the structured systematic design,the aircraft maintenance simulator will be disassembled to several maintenance models according to the demand of each core section of it,then carried out the maintenance model structure design.This structure is conducive to the work efficiency of maintenance simulator,support to maintain and further expansion of maintenance model,and could be a universal and standardized structure for exploitation of aircraft maintenance simulator.