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

What occurs automatically when engine anti-ice is operating?

1. Engine shutdown

2. Approach idle commanded by the EEC

3. Increased fuel consumption

4. Throttle reduction to minimum

The correct answer is: Approach idle commanded by the EEC

When engine anti-ice is operating, the automated system commands an approach idle setting through the Engine Electronic Control (EEC). This response is crucial because the activation of engine anti-ice systems requires adjustments to engine performance to compensate for the additional drag and potential power loss caused by ice accumulation on engine components. By commanding approach idle, the EEC ensures that the engine maintains sufficient thrust while optimizing fuel consumption under anti-ice conditions. This function is essential for maintaining safe engine operation and performance standards in potentially icy conditions. The other options, while they may seem plausible, do not operate automatically in conjunction with the activation of engine anti-ice systems. For example, shutting down an engine or reducing throttle to minimum would not be appropriate responses in this scenario, as they would compromise aircraft performance and safety. Increased fuel consumption could occur as a result of engine anti-ice operation, but it is not a specific automatic response like the adjustment of engine idle settings.