Aircraft Preventive Maintenance Data Evaluation Applied in Integrated Product Development Process

ABSTRACT: Initial Maintenance Review Board Report (MRBR) uses in service operation experience as a reference to define maintenance tasks intervals. However, in general, there is no structured data to compare systems performance and provide useful information to the analysts' decision-making. Even when engineering judgment is based on certification process, structural design, components intrinsic reliability and so on, the analysts responsible for maintenance tasks definitions tend to choose rather conservative proposals. This article presents a method to optimize preventive maintenance tasks intervals and use structured data based on interval optimization process to define maintenance intervals to those of similar systems under development. The method has been applied in an aircraft manufacturing company using current operation database after regulatory authorities' approval. As a result, it has been feasible to propose to the selected system, a maintenance task interval 100% higher than the one applicable to a similar system under operation.摘要：初始维护审查委员会报告（Initial Maintenance Review Board Report, MRBR）以在役运行经验为参考，用以制定维护任务的间隔周期。然而，当前普遍缺乏可用于对比系统运行性能、并能为分析人员决策提供有效支撑的结构化数据。即便分析人员在制定维护任务方案时，其判断依据虽涵盖认证流程、结构设计、组件固有可靠性等诸多因素，但仍倾向于采用较为保守的方案。本文提出了一种优化预防性维护任务间隔的方法，并依托基于间隔优化流程生成的结构化数据，为待开发的同类系统确定维护间隔。该方法在获得监管机构批准后，已应用于某飞机制造企业的现有运行数据库。最终，可为选定系统提出较现役同类系统提升100%的维护任务间隔方案。