What may happen if the fuel flow to a turbine engine is interrupted?

When the fuel flow to a turbine engine is interrupted, the most likely outcome is that the engine may stall. Turbine engines rely on a continuous supply of fuel to maintain combustion and produce thrust. If the fuel supply is cut off, the combustion process cannot occur, leading to a decrease in engine power.

In a turbine engine, stalling can occur due to the inability to sustain the required conditions for combustion, ultimately resulting in a loss of airflow through the engine. This process disrupts the normal operational cycle, causing the engine to lose thrust and potentially leading to a complete flameout if the interruption lasts for more than a brief moment. Thus, maintaining an uninterrupted fuel supply is critical for the sustained performance and operational safety of turbine engines.

The other options present scenarios that would not typically occur with an interruption in fuel flow. Engine performance would not improve; rather, it would decrease significantly. Idle speed cannot be maintained without fuel, and no significant changes will obviously not apply since the cessation of fuel flow leads to critical and immediate changes in engine operation.