本文件描述了用于对商用运输机（以下简称“飞机”）进行持续安全评估的指南、方法和工具。本文描述的过程旨在支持整体安全管理计划。它与表明遵守法规有关，也与确保公司符合其自身的内部标准有关。这些方法确定了评估持续安全性的系统方法，但不是唯一方法。 而经济决策- 制造是安全管理过程的一个组成部分，本文件仅涉及正在进行的安全评估过程。简而言之，本文件提出了“安全吗？”安全管理的一部分；它没有提到“它的成本是多少？”安全管理的一部分。 本文件也不涉及完成安全评估过程的任何具体组织结构。虽然组织结构的性质对安全计划的质量至关重要，但本文件侧重于要完成的功能，并不试图定义结构应该是什么。 其目的是让使用本文档的组织拥有最大的灵活性。

This document describes guidelines, methods, and tools used to perform the ongoing safety assessment process for transport airplanes in commercial service (hereafter, termed 'airplane'). The process described herein is intended to support an overall safety management program. It is associated with showing compliance with the regulations, and also with assuring a company that it meets its own internal standards. The methods identify a systematic means, but not the only means, to assess ongoing safety. While economic decision-making is an integral part of the safety management process, this document addresses only the ongoing safety assessment process. To put it succinctly, this document addresses the 'Is it safe?' part of safety management; it does not address the 'How much does it cost?' part of the safety management. This document also does not address any specific organizational structures for accomplishing the safety assessment process. While the nature of the organizational structure is significant to the quality of a safety program, this document focuses on the functions to be accomplished and does not attempt to define what the structure should be. The intent is to leave the greatest amount of flexibility to the organizations that use this document.