This specification established general design@ performance@ and test requirements for hydraulically powered servoctuators when used in aircraft flight control systems. Purpose: This specification is to be used as a guide and supplemental specification in preparing a detail specification for a particular servoactuator application. Classification: Servoactuators covered by this specification shall be of the following classes and types: Class A ?C Power Actuators Class B ?C Signal Conversion Actuator Class C ?C Power and Signal Conversion Actuator Combination Type I -65??to +160??fluid temperature range Type II -65??to 275??fluid temperature range Type III -65??to 390??fluid temperature range