What are the indications of an engine failure during flight?

The indications of an engine failure during flight include loss of thrust, abnormal engine instruments, and warning alerts. When an engine fails, the aircraft experiences a significant reduction in thrust produced by that engine, which can lead to an inability to maintain altitude or airspeed if corrective actions are not taken.

Additionally, abnormal engine instruments such as oil pressure, fuel flow, or temperature gauges might show readings outside of the normal operational parameters, signaling that there is a malfunction. Warning alerts from the aircraft's systems are also designed to notify the flight crew of critical situations, including engine failures. Together, these factors provide clear indications to pilots that an engine issue has occurred, allowing them to follow proper procedures to manage the situation safely.

In contrast, increased airspeed and altitude would not be expected during an engine failure. Reduced cabin pressure is unrelated to engine performance directly and would indicate a separate issue potentially related to pressurization systems. Normal engine sounds would suggest that the engines are operating correctly, which would not occur if there were an actual failure.