On the AFT FA panel, only one button has a plastic cover. Which button is that?

On the AFT FA panel, only one button has a plastic cover. Which button is that?

• A. Evacuation Horn
• B. PA Intercom
• C. Cabin Lights
• D. Fire Alarm

Answer: (A)

The key idea here is safety-critical controls often get a protective cover to prevent accidental activation. The evacuation horn is the one control that must only be triggered intentionally, since sounding the evacuation horn in error creates confusion and panic. To activate it, you typically must lift or flip the plastic cover and then press, ensuring deliberate action rather than a casual bump. The other controls—PA intercom, cabin lights, and fire alarm—are either used for routine operations or don’t carry the same immediate, high-stakes consequence if pressed by mistake, so they don’t have the protective cover.

The key idea here is safety-critical controls often get a protective cover to prevent accidental activation. The evacuation horn is the one control that must only be triggered intentionally, since sounding the evacuation horn in error creates confusion and panic. To activate it, you typically must lift or flip the plastic cover and then press, ensuring deliberate action rather than a casual bump.

The other controls—PA intercom, cabin lights, and fire alarm—are either used for routine operations or don’t carry the same immediate, high-stakes consequence if pressed by mistake, so they don’t have the protective cover.