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随着科学技术的发展,现代航空技术装备的结构越来越复杂,维护和修理的难度也越来越大,维修费用激增。在50年代末,美国空军的所有飞机的电子设备价值为35亿美元,而每年的维修赞用恰为其本身价值的两倍,即70亿美元。据统计,一架飞机全寿命期内的维修费用往往是飞机采购费用的数倍,如美国空军的A-10飞机,使用4年的保障就可买一架新的A-10飞机。据粗略估计,我国某型歼击机,使用4年就可买两架新飞机,而且随着使用时间的延长,维修费
With the development of science and technology, the structure of modern aviation technology and equipment becomes more and more complex, the difficulty of maintenance and repair is also increasing, and the maintenance cost is increasing rapidly. In the late 1950s, all Air Force aircraft had a value of $ 3.5 billion in electronic equipment, with twice as much repairs per year as their own, or $ 7 billion. According to statistics, the maintenance cost of an aircraft over its lifetime is often several times the cost of aircraft procurement, such as the US Air Force A-10 aircraft, using a 4-year guarantee to buy a new A-10 aircraft. According to a rough estimate, a certain type of fighter in China can buy two new aircraft after 4 years of use, and as the service time is extended, the maintenance fee