What is the consequence of pressing the ENG FIRE switch?

Pressing the ENG FIRE switch is a critical action in mitigating an engine fire emergency. This action commands the engine shutdown, which is essential to prevent the spread of fire and ensure the safety of the aircraft and its occupants. Additionally, it arms the fire bottles, which are used to release fire suppression agents directly into the engine area, providing an effective means of extinguishing flames.

In aviation protocol, the immediate priority in the event of an engine fire is to cut off fuel and ignition to the affected engine; thus, commanding an engine shutdown is a fundamental step. The activation of the fire bottles further enhances the response to the emergency by allowing for rapid fire suppression, significantly increasing the chances of containing the fire before it escalates.

The other choices focus on actions or notifications that do not directly address the immediate emergency actions required in the event of an engine fire, making them less relevant in this context.