How long does the chemical oxygen generator in the PSU run?

The chemical oxygen generator in the Passenger Service Unit (PSU) is designed to provide a supplemental oxygen supply in emergency situations, specifically for high-altitude flights. The selection of a duration of 12 minutes for the operation of the oxygen generator is based on its capability to deliver oxygen for about the duration needed to assist passengers and crew in reaching a safer altitude or to provide adequate breathable air during an emergency.

Understanding this timeframe is crucial since it ensures that the oxygen supply aligns with the expected protocols for descent and emergency management. This knowledge is essential for crew training and emergency procedures, allowing for effective communication with passengers and ensuring their safety during critical situations.