What do the condition levers do when the power levers are at flight idle?

The condition levers play a crucial role in managing engine performance, particularly in relation to the power levers. When the power levers are set to flight idle, the condition levers are primarily responsible for setting the idle N1 speed, which is the percentage of the engine's speed at the low power setting. This function is essential as it ensures that the engine operates smoothly and efficiently at lower power levels, allowing for optimal performance during flight phases where minimal thrust is required.

In contrast, increasing engine power or controlling fuel flow does not specifically relate to the function of the condition levers at flight idle, as these actions typically pertain to different operational settings. Activating the ignition system is also not within the scope of the condition levers in this context; ignition activation is typically related to starting the engine or specific emergency procedures.