During a flight, when is an engine-out procedure typically implemented?

Implementing an engine-out procedure is typically a direct response to an engine failure during flight. This procedure is critical as it involves specific steps and measures to maintain control of the aircraft and ensure the safety of those on board. When an engine fails, the pilot must execute the engine-out procedure to manage flight characteristics that change with the loss of thrust from one engine, especially in multi-engine aircraft.

This involves actions such as adjusting altitude, managing airspeed, and potentially preparing for a controlled descent or landing, depending on the extent of the failure and the aircraft's current situation. It is a planned response to a critical emergency situation rather than a routine practice or precautionary measure, as would be implied in situations like regular flight checks or turbulence. The engine-out procedure is specifically designed for responding effectively and promptly to an engine failure to maximize the chances of a safe outcome.