Final answer:
The MCDU T/O DATASET MENU for anti-ice on the ground must be activated when there are cold weather conditions coupled with visible moisture, or when operating on surfaces with snow, ice, slush, or standing water, typically when OAT is 10°C or below.
Step-by-step explanation:
In aviation, the MCDU (Multipurpose Control and Display Unit) T/O DATASET MENU must be activated for anti-ice on the ground under certain conditions to ensure that the aircraft's engines and other critical sensors are protected from ice accumulation which can occur in cold weather situations. This is particularly necessary when the outside air temperature (OAT) is low and there is visible moisture in the air such as rain, snow, or fog.
The specific procedure and timing can vary between aircraft models, but generally, this is required when OAT is 10°C or below and there is visible moisture or when operating on surfaces covered with snow, ice, slush, or standing water. Pilots must refer to their specific aircraft's operating manual for the exact conditions under which to activate the anti-ice system.
The MCDU T/O DATASET MENU must be activated when anti-ice is required on the ground to prevent ice formation on critical aircraft surfaces. It allows the pilot to select and configure the anti-ice systems on the aircraft during taxi and takeoff. This menu provides options to activate the anti-ice systems for the wings, engine inlets, and other essential components.