本文件定义了需要在飞机发动机、附件驱动装置和法兰之间定义接口的特征，并总结了各种航空航天标准尺寸性能数据。提供发动机制造商和附件制造商在解决公差和性能问题方面的集体协调努力和行业以往经验，从而节省可观的设计和开发时间的方法。

This document defines features that require interface definitions between aircraft engines and accessory drives and flanges and summarizes various aerospace standard dimensional performance data.To provide the means by which both engine manufacturers and accessory manufacturers may save appreciable design and development time by utilizing the collective and coordinated efforts and the past experience of the industry in solving the problems of tolerances and performance capability.