The Flight Director Indicator (FDI) is which of the following?

• A. One of the major components of a flight director system; it provides steering commands that the pilot (or the autopilot, if coupled) follows.
• B. A display for engine performance.
• C. A device that measures altitude.
• D. A radio navigation receiver.

Answer: (A)

The Flight Director Indicator is the visual cue that guides the aircraft by showing the commanded steering. It sits on the attitude indicator and displays cues (such as bars or pointers) that tell the pilot how to adjust pitch and bank to follow the desired flight path. If the system is coupled to the autopilot, those commands can be automatically followed, keeping the airplane on the commanded path. It is not used for engine performance data, altitude measurement, or as a radio navigation receiver, which are handled by separate displays and sensors.