According to the number of air crashes per million flights, 199 1 0 in 2000 was10.7, and199 first fell below1,and then fell to 0.85 again in 2000. According to the probability in 2000, that is, 1 176500 flights, a fatal air crash occurred. In other words, if someone flies once a day, it will take 3223 years to encounter an air crash.
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Aircraft safety refers to the degree to which the aircraft does not have catastrophic accidents. It can be expressed by the maximum allowable failure probability. The smaller the failure probability, the better the aircraft safety, which is closely related to the reliability of the aircraft and its equipment. In the design, the possible failures of the system or components, the possible manipulation errors of pilots and the influence of external accidents should be considered. Carefully design, reduce and estimate the accident probability of the system. Take the automatic landing system as an example. The maximum allowable failure probability stipulated by ICAO is seven tenths. If it is less than this value, it is considered that the system can be used for automatic landing and is safe.
In addition, auxiliary equipment and human factors can be reasonably used to reduce and ensure that catastrophic accidents do not occur and improve aircraft safety. In the design, in addition to the general safety requirements, there are specific requirements and regulations for some areas and situations that are prone to catastrophic accidents, such as fire safety requirements, engine explosion areas, lightning strike areas, tire explosion areas, sudden pressure release in the plenum, and flammable liquid discharge.
Baidu Encyclopedia-Aircraft Safety