In this paper

the principal component analysis method is proposed for engine flight mission profiles categorization.Eighteen flight mission profiles of a fighter engine are categorized.The categorization is based on 4 parameters

namely

flight height

flight Mach number

engine rotational speed and overload on the engine center of gravity.4 principal components of the mentioned 4 parameters are obtained

the accumulated contribution ratio of the first two principal components arrives at 81 1%.The qualitative categorization can be done from the first and the second principal components distribution range in the principal plain.Finally

a tree shaped category graph is acquired by quantitative categorization using center of gravity method.The results show that the proposed method is feasible.