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What does an electronic engine control (EEC) in a FADEC aircraft rely on for optimal engine control output?

  1. Crosstalk between channels

  2. Manual adjustments from the pilot

  3. Feedback from ground control

  4. External monitoring systems

The correct answer is: Crosstalk between channels

An electronic engine control (EEC) in a Full Authority Digital Engine Control (FADEC) aircraft optimally processes and adjusts engine performance parameters using data from multiple channels within the system. Crosstalk between channels refers to the communication and interaction between different hardware and software components within the engine control system. This interaction allows the EEC to cross-verify information, ensuring that it acts on the most accurate and reliable data available. By utilizing crosstalk, the EEC can quickly adapt to changing conditions and make real-time adjustments to maintain optimal engine performance and efficiency. In contrast, options involving manual adjustments from the pilot or feedback from ground control do not align with the automatic and efficient nature of a FADEC system, as it is designed to minimize pilot intervention and rely on onboard data. While external monitoring systems could provide additional data, they are typically not the primary source for engine control adjustments within a FADEC framework. The core functioning of the EEC is thus heavily reliant on the integrated data from its channels to ensure the best possible engine operation.