Definition: This Aerospace Standard covers two basic Stall Warning Systems, one measures air flow and pressure distribution on the airfoil and the other measures the angle of airflow with respect to an arbitrary reference line. Each type of system includes, as a minimum, a sensor and the means for activating a device which warns the pilot of an impending stall.

Sensor Category Usage: Sensors will be categorized for operation in either of the following:

Category A - For use on aircraft certified for flight into known icing conditions.

Category B - For use on aircraft not certified for flight into known icing conditions.