What is a common indication of engine failure during flight?

A common indication of engine failure during flight is the presence of abnormal engine sounds or vibrations. This can manifest as an unusual roar, sputtering noise, or increased vibration levels that were not present during normal engine operation. These auditory and physical cues are critical for pilots to recognize as they often signify that the engine is not functioning properly, and urgent attention is required.

When an engine begins to fail, the performance may deteriorate, leading to these abnormal signals, which can alert the flight crew to the need for immediate assessment and response to ensure the safety of the aircraft and its occupants. Recognizing these signs is a key part of pilot training and effective cockpit resource management.

In contrast, an increase in altitude may not directly indicate engine failure; it could happen for various reasons that are not related to engine performance, such as power settings or atmospheric conditions. A stable airspeed and descent rate generally reflect a well-functioning engine in steady flight, and while a sudden loss of cabin pressure can indicate a serious issue, it does not specifically relate to engine performance. Hence, recognizing abnormal engine sounds or vibrations is vital for the early detection of engine failure.