FAA Powerplant Written Practice Test

During what stage should the ignition system be checked for proper function?

1. Only during initial engine assembly

2. Regular maintenance checks

3. When replacing spark plugs

4. Only after malfunction

The correct answer is: Regular maintenance checks

The ignition system should be checked for proper function during regular maintenance checks. This is essential as it ensures the ignition system operates efficiently and reliably throughout the engine's lifecycle. Regular testing can help identify potential issues before they lead to more serious problems, such as difficulty starting the engine or poor performance. Additionally, routine checks can include verifying the condition of components like the spark plugs, ignition leads, and wires. Proper function of the ignition system is crucial for optimal engine performance, fuel efficiency, and minimizing emissions. By incorporating regular checks into maintenance schedules, operators can proactively address any wear and tear or malfunctions that could affect engine operation. While there are specific instances, such as after replacing spark plugs or during initial assembly, that may trigger a check, regular maintenance is more comprehensive and contributes to the overall health of the engine over time. Checking the ignition system only after a malfunction or during assembly would not ensure consistent performance and could lead to unexpected issues in between maintenance intervals.