Abstract: A modular control device which may be used separately or in predetermined multiples to provide desired detection and correction functions along with appropriate control functions normally associated with current day aircraft flight control. The module includes a housing which makes provisions for a plurality of bores capable of receiving various types of valve mechanisms therein. Control valves such as a servovalve and a solenoid valve are affixed to the housing and are hydraulically interconnected with the valves disposed in the various bores. The module may be connected to a hydraulic actuator which is moved to in turn position a load in accordance with control signals applied to the control module.