1现状调查2012年过站故障航班的正点率经过调查统计:第一季度故障航班数59,延误数16,延误率27.1%;第二季度故障航班数48,延误数11,延误率22.9%;第三季度故障航班数72,延误数19,延误率26.4%;第四季度故障航班数60,延误数15,延误率25.0%;全年总计平均延误率为 1 Status quo survey punctuality rate of over-the-counter flights in 2012 After investigation and statistics: the number of failed flights in the first quarter of 59, the number of delays of 16, the delay rate of 27.1%; the number of failed flights in the second quarter of 48, the number of delays of 11 and the delay rate of 22.9% The number of failed flights in the third quarter was 72, the number of delays was 19 and the delay rate was 26.4%. The number of failed flights in the fourth quarter was 60, the number of delays was 15 and the delay rate was 25.0%. The total average delay rate was