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Research on the calculation method for the maintenance interval of airborne products

The maintenance interval is the basic elements for the preventive maintenance of an airborne product. It is generally determined by using qualitative methods presently. How to establish a scientific and practical method to calculate the maintenance interval has become a important issue in the aviation. In order to solve the problem, this paper analyzes firstly that the depth of product maintenance make the impact on its reliability and points out that the reliability for before and after the repair of the non-fully repair sample have correlation, so this paper updates the traditional method of disposal the sample information and establishes a calculation model based on the Weibull distribution for the preventive maintenance interval of the product. Then it proposes a set of methods to calculate the maintenance interval of each preventive maintenance type such as Hard time removal or discard, Functional test and Operational check. Finally, it introduces the calculation steps and the examples. The practical application proves that the model is scientific, reasonable, simple and low investment, which can meet the engineering need for determining product maintenance interval.