本SAE航空航天推荐规程（ARP）为军用飞行控制伺服执行器中使用的飞行关键控制阀（FCCV）设计的设计、开发、鉴定试验、过程控制和生产验收试验提供了指导，其中失去单个阀控制可能导致灾难性故障，导致死亡、永久完全残疾和/或超过规定合同限制的经济损失。作为飞行控制致动器伺服控制回路的一个元件的FCCV是可变位置控制阀，其调节进入和离开伺服致动器动力级气缸的流体。FCCV可以由机械飞行控制系统机械驱动，如 图1 或由电液伺服阀（EHSV）调制控制流液压驱动，如所示 图2 这种类型的控制阀不是EHSV或直接驱动阀(DDV)。 FCCV用于符合AS5440的军用液压系统。

This SAE Aerospace Recommended Practice (ARP) provides guidance in the design, development, qualification test, process control and production acceptance test for flight critical control valve (FCCV) design used in military flight control servoactuators where loss of single valve control could cause a catastrophic failure resulting in death, permanent total disability, and/or financial loss exceeding a defined contractual limit. The FCCV, which is one element of a flight control actuator servo control loop, is a variable position control valve which modulates fluid into and out of the servoactuator power stage cylinders. The FCCV may be mechanically driven by either a mechanical flight control system as shown in FIGURE 1 or hydraulically driven from electro-hydraulic servo valve (EHSV) modulation control flow as shown in FIGURE 2 . This type of control valve is not an EHSV or a direct drive valve (DDV). The FCCV is used in military hydraulic systems which conform to AS5440.