引言对于民航而言,安全是最大的节约,事故是最大的损失。1985年,美国联合航空公司进行的一项调查表明:在过去20年中,世界各地共发生5万件空难事故,其中只有1/5是属于机器故障,4/5竟是由于人为因素造成的。如今,世界民用航空中有70%～80%的飞行事故与人误直接相关。人 Introduction For civil aviation, safety is the greatest saving and accidents are the biggest losses. In 1985, a survey conducted by United Airlines showed that over the past 20 years, a total of 50,000 air crash accidents occurred worldwide, of which only one-fifth were machine failures and four-fifths were caused by human factors . Today, 70% to 80% of world civil aviation accidents are directly related to human error. people