What mode is the Auto Flight system said to be in when controlled by an MCDU?

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The Auto Flight system is in Managed Mode when it is controlled by the MCDU (Multi-function Control and Display Unit). In Managed Mode, the flight management system automatically determines the most efficient route and flight parameters, based on the flight plan inputted through the MCDU. This includes managing altitude, speed, and navigation while allowing the pilots to focus on other operational tasks.

The MCDU plays a key role in this mode by allowing pilots to input flight parameters or select pre-programmed flight profiles. The system will then use this information to execute the flight safely and efficiently, adjusting the aircraft's flight path as necessary.

In contrast to Managed Mode, Selected Mode would require pilots to manually set each parameter, which is not the case when the Auto Flight system is relying on data from the MCDU. Automatic Mode is not a term specifically associated with the functionality provided by the MCDU; it could be more generic or refer to other systems. Direct Mode typically refers to a scenario where manual control is exercised without the system's automated guidance. Therefore, Managed Mode is the correct and precise term for the operation of the Auto Flight system when using inputs from the MCDU.

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