What is the correct starting sequence for a turbine engine?

The correct starting sequence for a turbine engine is starter, ignition, and then fuel. This sequence is crucial for ensuring that the engine starts smoothly and reliably.

When starting a turbine engine, the starter is first engaged to spin the engine, bringing it up to a speed where it can produce enough airflow for combustion. Once the engine reaches the appropriate RPM, ignition is introduced. This involves activating the ignition system, which ignites the fuel-air mixture within the combustion chamber.

Introducing fuel at this stage is essential—only after ignition has been established should fuel be introduced to ensure a stable combustion process. If the fuel were introduced before ignition, it could lead to unburned fuel pooling, resulting in possible flooding or an unsuccessful start, as well as safety hazards.

This sequential approach minimizes the risk of a hot start or engine failure, making it the standard practice in turbine engine operations.