我国民用航空低温修正现状分析

Analysis on the Current Situation of Low Temperature Correction for Civil Aviation in China

随着中国民航业的飞速发展,我国机场和机队的数量不断壮大,遍布全国各地。我国幅员辽阔,地形复杂,南北温差较大,特别是我国北方地区季节性变化明显。近年来,北方不少地区冬季出现了低于-30℃的极端低温情况,导致实际温度比ISA温度低很多。航空器在这种极端低温条件下运行,会使实际飞行高度比气压式高度表指示的高度偏低,从而降低了飞行安全裕度。为解决该飞行安全问题,我国民航目前使用了一些低温修正的方法,如利用修正表修正、FMC修正及利用飞行程序修正。

In recent years, the extreme low temperatre -30℃ has occurred several times in some north areas,which caused the actual temperature much more lower than ISA temperature. In this condition, the actualaltitude of aircraft will be lower than the altimeter indicated. So the safety margin will be reduced. To solve thisproblem, we used some methods like chart correction, FMC correction and flight procedure correction tocorrect the altitude affected by low temperature.