Research on interval optimization method of periodic maintenance for aircraft flight test

Preventive maintenance, a significant factor contributing to aircraft unavailability during flight testing, plays a critical role in improving flight test efficiency, mitigating operational risks, and refining maintenance scheduling. By examining the distinct characteristics of flight test operations in comparison with civilian aircraft activities, a foundational framework and procedural approach for optimizing maintenance intervals have been proposed. A systematic method for the collection and processing of flight test data has been developed, enabling the accurate calculation of optimized maintenance intervals. Verification using actual flight test data confirms the accuracy and engineering feasibility of the proposed method.