The cabin altitude warning system alerts crew using what devices?

• A. Warning bells or lights
• B. Automatic passenger oxygen masks deployment
• C. Automatic engine relight
• D. Fuel pump activation

Answer: (A)

When cabin altitude rises to a unsafe level, the system uses audible and visual signals to grab the crew’s attention. The warning bells and warning lights are the immediate cues that alert crew members to pressurization issues so they can descend and don oxygen as needed. Automatic deployment of passenger oxygen masks is a subsequent action tied to the alarm, not the alert method itself. Automatic engine relight and fuel pump activation aren’t part of the cabin altitude warning alert.