What is the recommended practice for engine shutdown after landing?

The recommended practice for engine shutdown after landing involves reducing the throttles to idle and then shutting down the engines in a prescribed sequence. This approach ensures that the engines are properly decelerated before shutdown, which helps in preventing potential issues related to engine stalling or mechanical stress. Following a specific sequencing for shutting down the engines helps maintain the aircraft's stability during the shutdown process and adheres to standard operating procedures, which are designed to enhance safety and reliability.

This method also allows for the appropriate management of the aircraft's systems and ensures that critical components are deactivated in a controlled manner. A sequential shutdown process is especially important in multi-engine aircraft, where the order of shutdown can have implications for aerodynamic stability.

The other options do not align with standard practices. For instance, shutting down both engines immediately after landing would be unsafe, as it could lead to a loss of hydraulic and electrical power, complicating the landing roll and taxi operations. Keeping the engines running until reaching the gate may waste fuel unnecessarily and may not be appropriate for all operational contexts, especially if the aircraft needs to be shut down for maintenance or inspections. Gradually reducing throttles and maintaining idle for an extended period is not standard practice and could unnecessarily prolong the time spent on the runway or