FAA Powerplant Written Practice Test

What advantage does Full Authority Digital Engine Control (FADEC) provide over traditional controls?

1. Improved reliability and efficiency

2. Lower cost of maintenance

3. Simpler design for engineers

4. Manual override capability

The correct answer is: Improved reliability and efficiency

Full Authority Digital Engine Control (FADEC) provides significant advantages in terms of improved reliability and efficiency. The system automates many of the functions that would typically require manual intervention with traditional mechanical controls. By utilizing digital computation for engine management, FADEC continuously monitors operating conditions and makes real-time adjustments to fuel flow, ignition timing, and other critical parameters. This precise control leads to enhanced performance and fuel efficiency, maximizing the output of the engine while minimizing wastage. Furthermore, the digital nature of FADEC systems contributes to reliability since they eliminate many moving mechanical parts that can wear out, reducing the likelihood of mechanical failure. The integrated nature of FADEC systems also allows for more effective diagnostics and health monitoring, which can identify issues before they become serious problems, further enhancing engine reliability. In contrast, alternatives like lower maintenance costs or simpler designs may not fully capture the primary benefits that FADEC offers, as many factors play into those areas. Manual override capability, while useful, is generally less of a focus with FADEC systems, which aim to automate control for optimal performance without the need for frequent manual adjustments. Thus, the primary advantage of FADEC lies in the way it boosts both reliability and efficiency through advanced digital control technologies.