Proper maintenance and monitoring of spark plugs is essential to ensuring the safe and reliable operation of an aircraft.

Aircraft spark plugs are a crucial component of an aircraft's ignition system. Without them, an aircraft's engine would not be able to start or run properly. The function of a spark plug is to ignite the fuel and air mixture in the combustion chamber of the engine. This creates a controlled explosion that powers the engine and propels the aircraft forward.
In the early days of aviation, spark plugs were simple and crude. They were often made of metal and had only a single electrode. As technology improved, spark plugs became more advanced. Today, aircraft spark plugs are made of high-quality materials and have multiple electrodes that provide a more reliable and consistent spark.
There are different types of aircraft spark plugs, including those designed for high-power engines and those for low-power engines. Spark plugs for high-power engines are usually made of platinum, while those for low-power engines are made of nickel. Platinum spark plugs are more durable than nickel spark plugs and can operate at higher temperatures without melting.
One of the most important considerations when choosing aircraft spark plugs is their heat range. The heat range refers to the temperature range at which the spark plug can operate without overheating or fouling. It is important to choose a spark plug with the correct heat range for the engine it will be used in. If a spark plug has too high of a heat range, it will not be able to dissipate heat effectively and may overheat. On the other hand, if a spark plug has too low of a heat range, it may become fouled with carbon deposits.
In addition to choosing the correct heat range, it is also important to properly maintain aircraft spark plugs. Spark plugs should be checked regularly and replaced when necessary. If a spark plug is not functioning properly, it can cause misfires, which can lead to engine damage or failure.