FAA Powerplant Written Practice Test

In a supervisory electronic engine control, what occurs if there is a fault that affects engine operation?

1. A The system initiates an automatic shutdown

2. B It defaults to hydro mechanical fuel control

3. C Pilot intervention is required

4. D It resets all system parameters

The correct answer is: B It defaults to hydro mechanical fuel control

In a supervisory electronic engine control system, when a fault affecting engine operation occurs, the system is designed to ensure continued operation of the engine, maintaining safety and performance as a priority. In situations of failure or fault, the electronic control system typically defaults to hydro-mechanical fuel control. This is an important feature as it allows the engine to continue functioning using a more traditional, mechanically controlled system until the issue can be addressed. The hydro-mechanical system serves as a backup, ensuring that the engine maintains its operational capabilities without immediate pilot intervention. This is crucial in maintaining control and minimizing the risk of total engine failure. The electronic system not only monitors performance but also seamlessly transitions to a backup method of control to enhance safety. In contrast, the options regarding automatic shutdown, pilot intervention, or resetting system parameters do not reflect the typical operational design of supervisory electronic engine controls, which prioritize redundancy and continuous operation in the face of faults.