Abstract: One of the most important things in formulating aircraft maintenance program is to determine the zonal inspection intervals. The process of Zonal Analysis is composed of standard zonal analysis and enhanced zonal analysis process. Since the latter always touches upon stuffs like wire, combustible materials and EWIS components, it’s more complicate to conduct concrete and logical analysis. This article analyzes the impact of enhanced zonal rating factors, establishes a hierarchical index evaluation system and then utilizes the improved Fuzzy Analytic Hierarchy Process (FAHP) to determine the indexes’ weight. Moreover, the zonal inspection intervals can be established according to the correspondence between rates and intervals. Finally, simplify the operation of the model by applying Mathematica Programming and take a typical zone of an aircraft as an example to verify the method.