What is the proper start sequence for a turbine engine?

The correct sequence for starting a turbine engine is to activate the starter first, then introduce ignition, and finally feed fuel into the combustion chamber. This order is critical because the starter is responsible for providing the necessary rotational speed to initiate the combustion process. Once the starter is engaged, it is essential to introduce ignition next to ensure there is a spark available to ignite the fuel-air mixture when it is subsequently introduced. Feeding fuel before the ignition can lead to unburned fuel collecting in the combustion chamber, which is inefficient and can create a hazardous situation.

The process emphasizes safety and engine efficiency, ensuring that all components are properly engaged at the right time to achieve a safe and successful start. Starting the engine in the wrong order could result in difficulties in ignition or even engine damage.