在我国,支线航空主要指省内及邻省中小城市间的航空客货运输,航线距离一般不超过500千米.我国支线航空运输是从80年代初才开始起步的,以国产Y-7飞机为主力机型.“八五”期间统计数据表明,我国的支线运输航线从67条增加到84条,运送旅客从104万人 In our country, regional aviation mainly refers to the air passenger and freight transportation between small and medium cities in the province and its neighboring provinces, and the distance between airlines is generally not more than 500 km. China's regional air transportation started only from the early 1980s. With the domestic Y-7 aircraft As the main model.The statistical data during the “Eighth Five-Year Plan” indicates that the number of regional feeder routes in our country increased from 67 to 84, and the number of passengers transported from 1.04 million