Table of Contents (click to expand)The Need For An Emergency Oxygen System In AircraftWhere Do Oxygen Masks Get Their Oxygen From? In the event of a cabin depressurization emergency, passengers are advised to pull down their oxygen masks. The masks are attached to an oxygen generating system that produces breathable oxygen from a chemical reaction. The reaction is started by releasing a firing pin, which is activated when you tug on the mask. The chemicals in the generator burn and release oxygen gas, which is channeled to your nose through a pipe. The mask will provide breathable oxygen for 12-20 … Continue reading Do Airplanes Really Carry Oxygen For The Oxygen Masks?