What is the first action to take for an internal engine fire?

When addressing an internal engine fire, the first action should be to notify the pilot using a lazy 8 signal. This method is crucial because the pilot needs to be aware of the emergency situation immediately to take necessary actions, such as shutting down the engine or preparing for an emergency landing. The lazy 8 signal is a recognized communication gesture that allows the ground crew to effectively alert the pilot to the situation without causing distractions or delays.

While other actions, such as using the fire extinguisher or shutting down the engine, are important subsequent steps, they should not be the first response. It's essential to communicate with the pilot first to ensure they are informed about the emergency and can respond appropriately. Additionally, notifying the ground crew is also a necessary action but typically follows the establishment of communication with the pilot, making the lazy 8 signal the priority in an internal engine fire scenario.