What is the duration of the CRJ 200 passenger oxygen system?

• A. Ten minutes
• B. Thirteen minutes
• C. Fifteen minutes
• D. Twenty minutes

Answer: (B)

The system is designed to provide passenger oxygen for a fixed period after deployment, specifically thirteen minutes. This duration comes from the chemical oxygen generators installed in the CRJ 200 and is chosen to ensure passengers have a continuous supply of oxygen long enough for the airplane to descend to a breathable cabin altitude and for any emergency procedures to be completed. If the duration were only ten minutes, it could be insufficient for a safe, controlled descent and for passengers to stabilize; if it were fifteen or twenty minutes, that would exceed what the system is certified to provide. In short, thirteen minutes balances safety requirements and the system’s capacity, giving passengers reliable oxygen coverage during the critical early phase of a depressurization event.