Research on repair level analysis technology for civil aircraft structural components based on S3000L Standard

At present，the main manufacturers of civil aircraft in China often use empirical judgment to make repair level decisions for structural components，especially with limited decision-making experience in workshop repairs. Therefore，there is an urgent need to conduct research on repair level analysis technology. Level of repair analysis is not only one of the important links in the logistics support analysis of civil aircraft components，but also an important input for the planning and preparation of component maintenance manuals. Most international mainstream civil aircraft manufacturers have begun to adopt the S3000L Standard for logistics support analysis. The level of repair analysis（LORA）method provided in the S3000L Standard is studied，and a repair level analysis process suitable for civil aircraft structural components is developed in combination with the experience of continuous airworthiness document organization. Practical examples are also used for feasibility verification. The results show that using noneconomic simplified LORA analysis method for structural components is more feasible at present. The analysis process can provide reference for domestic main manufacturers to develop structural component maintenance manuals.