FAA Powerplant Written Practice Test

What is true about FADEC engine systems?

1. They are exclusively for jet engines

2. They use carburetor systems for fuel control

3. They are solid state ignition and fuel control systems

4. They are only found in experimental aircraft

The correct answer is: They are solid state ignition and fuel control systems

FADEC, or Full Authority Digital Engine Control, is a sophisticated system that manages the engine's performance by controlling fuel flow, timing, and other critical parameters using digital electronics. The term "solid state" refers to the electronic components that constitute the FADEC system, which are capable of making adjustments in real time to optimize engine efficiency, performance, and emissions. This precision and adaptability allow for improved fuel management compared to older systems, contributing significantly to modern aircraft performance. FADEC systems are not confined to just jet engines; they can also be found in turboprop engines and some piston engines, making the assertion that they are exclusively for jet engines inaccurate. Additionally, FADEC does not utilize carburetor systems for fuel control; instead, it directly manages fuel injectors, which is a characteristic of modern fuel management techniques. Lastly, while FADEC systems can be utilized in various aircraft, their application is not limited to experimental aircraft; they are commonly found in commercial and military aviation as well, enhancing reliability and efficiency.