本文件规定了适用于压力高达35 000 kPa（5 000 psi）的飞机液压系统的可变排量单向和双向液压马达的一般要求。 这些要求包括: -设计要求； -测试要求。 本文件包括一次和二次功能电机（见第4条）；但是，不包括具有内部旋转角度限制的致动器和低速电机。 本文件旨在与每种应用特定的详细规范结合使用。

This document establishes the general requirements for variable displacement uni-directional and bi-directional hydraulic motors, suitable for use in aircraft hydraulic systems at pressures up to 35 000 kPa (5 000 psi). These requirements include: — design requirements; — test requirements. Primary and secondary function motors (see Clause 4) are covered in this document; however, actuators with internal rotation angle limits and low-speed motors are not covered. This document is intended to be used in conjunction with the detail specification that is particular to each application.