What is the difference between managed and selected modes on the autopilot and on the MCDU?

• A. Selected modes are commanded directly by the pilot; Managed modes use FMS targets.
• B. Managed modes use FMS-provided targets; Selected modes are commanded directly by the pilot.
• C. Managed modes ignore FMS targets; Selected modes rely on weather data.
• D. Both modes are identical in function.

Answer: (B)

The key idea is that managed modes let the autopilot follow what the FMS has planned, while selected modes let you command specific values directly. In managed mode, the autopilot relies on targets produced by the FMS for both lateral and vertical control. This means it follows the programmed route (LNAV) and a vertical profile with speed and altitude constraints (VNAV), adjusting automatically to stay on the flight plan and optimize performance.

In selected mode, you override those targets by inputting a direct command, such as a particular heading, altitude, or speed, and the autopilot flies that value until you change it or switch back to managed mode. The MCDU is the interface that builds and displays the FMS plan; when you’re in managed mode, the autopilot uses those FMS-derived targets, and when you’re in selected mode, your direct inputs take precedence.

Weather data does not determine whether you’re in managed or selected mode; the distinction is about following FMS targets versus executing pilot-entered commands.