Which oxygen system includes the fixed cabin oxygen capability that drops masks automatically at a predefined cabin altitude?

Which oxygen system includes the fixed cabin oxygen capability that drops masks automatically at a predefined cabin altitude?

• A. Crew Oxygen System
• B. Passenger Oxygen System
• C. Medical Oxygen System
• D. Fixed Cabin Oxygen System

Answer: (D)

Automatic deployment of oxygen masks from overhead panels when cabin altitude rises is a feature of the fixed cabin oxygen system. This system is built into the aircraft and provides oxygen to all occupants; when the cabin reaches the preset altitude, the masks are automatically released so passengers can don them quickly without any action. The crew oxygen system serves the pilots with their own masks and operates independently of the passenger mask deployment. A medical oxygen system is reserved for medical use and isn’t designed to supply the entire cabin. A generic passenger oxygen system might refer to portable units or a non-fixed arrangement and doesn’t specify automatic fixed deployment. So, the system with the fixed automatic cabin-deployment capability is the fixed cabin oxygen system.

Automatic deployment of oxygen masks from overhead panels when cabin altitude rises is a feature of the fixed cabin oxygen system. This system is built into the aircraft and provides oxygen to all occupants; when the cabin reaches the preset altitude, the masks are automatically released so passengers can don them quickly without any action. The crew oxygen system serves the pilots with their own masks and operates independently of the passenger mask deployment. A medical oxygen system is reserved for medical use and isn’t designed to supply the entire cabin. A generic passenger oxygen system might refer to portable units or a non-fixed arrangement and doesn’t specify automatic fixed deployment. So, the system with the fixed automatic cabin-deployment capability is the fixed cabin oxygen system.