What are the common causes of plane crashes?

The causes of plane crashes are generally human factors, mechanical failures and meteorological and environmental factors.

According to the statistics of flight accidents in fiscal years from 1978 to 1982, during this period, there were 9 major flight accidents every year on average, including 27 fatal accidents (first-class accidents) and 64 non-fatal accidents (second-class and third-class accidents).

In these accidents, human factors are the main reason, accounting for 75% of the total number of accidents; Followed by mechanical failure (including equipment failure), accounting for 29%; Meteorology, environment and other factors account for 5%.

Extended data

China civil aviation divides flight accidents into three grades.

1, Class I accident: the aircraft is seriously damaged or scrapped, and people die during or within 10 days after the accident; The plane was forced to land on the water, mountains, swamps and forests, which made it impossible to enter, and caused death in the accident or within 10 days after the accident; The plane is missing.

2. Class II accident: the aircraft was seriously damaged or scrapped, but no one died in the accident or within 10 days after the accident; The plane was forced to land on the water, mountains, swamps and forests, and could not be transported out, but no one died during or after the accident 10 days; People died within 10 days after the accident, but the plane was not seriously damaged or scrapped.

3. Class III accident: the plane was slightly damaged, but it did not cause serious injury or death.

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