Preignition
Definition
Ignition of the fuel-air charge before the spark plug fires, caused by a hot spot in the combustion chamber. More dangerous than detonation as it can melt pistons and valves. Requires immediate power reduction.
Why Preignition Matters for Pilots
Understanding Preignition is important for pilot certification exams and safe flight operations. This concept appears on FAA and EASA knowledge tests, and examiners may ask about it during oral checkrides. A thorough understanding of Preignition helps you make better decisions in the cockpit.
Exam Tip
This concept is commonly tested in engines-related questions on FAA and EASA exams. Make sure you can explain Preignition in your own words for the oral exam. Practice applying this concept to real-world scenarios, not just memorizing the definition.
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