Your engine began experiencing an uncommanded rollback. What should be suspected?

An uncommanded rollback in an aircraft engine occurs when there is a sudden and unexpected decrease in engine power, which can be critical during flight. In this scenario, both lower fuel quality and oil contamination can lead to this issue.

When fuel quality is compromised, it may not combust efficiently, leading to a decrease in engine performance or power output. Poor fuel quality can result from contamination or degradation, creating irregularities in combustion. This can cause an uncommanded rollback, as the engine struggles to maintain the required power levels due to inadequate fuel.

On the other hand, oil contamination can affect the engine's ability to function properly. Oil serves crucial roles in lubrication, cooling, and sealing; any contamination can lead to increased friction, overheating, and ultimately a reduction in engine power. Since oil contamination can result in engine inefficiencies and an inability to maintain proper performance levels, it is another factor that could contribute to an uncommanded rollback.

Thus, in the context of experiencing an uncommanded rollback, both lower fuel quality and oil contamination are significant concerns. Their potential to impair engine function justifies the selection of the combined option, highlighting the importance of monitoring both fuel and oil conditions for ensuring reliable engine performance.