During an engine failure with an engine fire on the ground, after the throttle is full open, what should be done next?

When faced with an engine failure combined with an engine fire on the ground, the immediate response should prioritize safety and fire control. Shutting down the engine is critical in this scenario because it cuts off the fuel supply, reducing the risk of further fire escalation. Keeping the throttle at full open could exacerbate the situation by allowing more fuel to continue flowing, which may intensify the fire.

In an emergency like this, safety protocols dictate that you eliminate any potential sources of ignition or fuel input to the fire, which is precisely what shutting down the engine accomplishes. It is crucial to act quickly to protect both the aircraft and any personnel on the ground. The other options would not effectively address the emergency and could lead to a more dangerous situation.