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In order to ensure flights' safeness and efficiency, the airline makes it a target to steadily improve the aircraft's dispatch rate. Civil aircraft multiple level health condition assessment technology will fully utilize different engineering data, technical data and reliability data. It builds quantification assessment method for aircrafts' dispatch and selects major parameters affecting aircraft dispatch rate. It also builds integrated quantification analysis model by weight distribution of flight parameters, provides dispatch decision advice accurately and fast according to operation demand of private planes, VIPs and other special flights whose safety and dispatch reliability will be guaranteed. It is revealed in the practical work that the aircraft multiple level health condition assessment can effectively improve the aircraft's dispatch reliability and daily utilization rate. It has important engineering utilization value.