This standard defines the minimum requirement for the design, construction and performance of continuous flow oxygen masks for crew and passengers of general aviation civil aircraft.This standard includes the following types of continuous flow oxygen masks. A. Open port dilution rebreathing masks. B. Valved or restrictive phase dilution rebreathing masks. C. Valved or restrictive phase dilution reservoir masks. D. Open port or restrictive dilution mask without rebreathing or reservoir bag.
