Research on the analysis method of civil aircraft operational safety data

In the civil aircraft certification process, theoretical or empirical data provided by equipment suppliers are used to demonstrate compliance with the safety requirements related to CCAR 25.1309. During the aircraft operation phase, operational safety monitoring is required to continuously evaluate the operational data to confirm or correct the theoretical data given in the pre-certification system safety assessment process and to indicate the actual safety level of the aircraft. Through the operational safety data analysis method, the actual level of the aircraft is compared and analyzed with the deviation of the pre-certification safety target value, and corrective measures are taken to improve the aircraft operational safety level if necessary.