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

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How many modes does the EEC have?

One mode
Two modes
Three modes
Four modes

The correct answer is: Two modes

The correct answer is that the EEC (Electronic Engine Control) has two modes. This information is important in understanding the functionality of the EEC system in advanced aircraft engines. The two main modes of operation typically include the Normal Mode and the Alternate Mode. In Normal Mode, the EEC operates under standard parameters, ensuring optimal engine performance and efficiency during typical flying conditions. In contrast, the Alternate Mode serves as a backup, activating in cases of system faults or anomalies, ensuring that the engine can still operate safely and effectively even when certain parameters change or when there's a failure in the primary control logic. This dual-mode system enhances the reliability and safety of engine operation, allowing for a smooth transition between modes depending on the operational requirements and conditions encountered during flight.