Abstract: Aircraft operational environment affects material fatigue behavior and structure service life of aircraft significantly as repeated loads do. In this paper the profile environment analysis method for aircraft operational environment spectrum compilation is put out and operational procedure of the method is stated. An operational environment spectrum of N5A air- craft is compiled with the method. The method is of general usage and engineering application. It can be used for compiling operational environment spectra of different type aircraft.

Key words: arospace environment, environment models, aircraft specification