General Authority of Civil Aviation (GACA) Aeronautical Information Publication (AIP) Practice Exam

What actions are taken when the engine fire switch is pulled?

1. Only closes fuel valves

2. Arms engine fire extinguishers

3. Discharges fire extinguisher immediately

4. Shuts off all electrical power

The correct answer is: Arms engine fire extinguishers

When the engine fire switch is pulled, it serves a critical function in managing an engine fire scenario. One of the primary actions it initiates is arming the engine fire extinguishers. This means that the fire suppression system is prepared to be activated, ensuring that the aircraft is ready to respond to an engine fire effectively. In practical terms, arming the extinguishers allows for the potential discharge of the fire-extinguishing agent once the pilots decide that it is necessary to combat the fire. This step is crucial because it ensures that the firefighting system can be used at the appropriate moment to mitigate any risk posed by the fire. The other actions commonly associated with the engine fire switch may include closing fuel valves and cutting off other systems, but the specific action of arming the fire extinguishers represents a deliberate preparedness step that is vital for safety.