Which function is NOT handled by the Flight Director?

The Flight Director system is designed to assist pilots in flying the aircraft by providing guidance for desired flight paths. Its functions typically include providing lateral and vertical guidance, as well as setting target altitudes for autopilot operations.

When it comes to controlling engine thrust, this is not a function of the Flight Director. Instead, engine thrust control falls under the purview of the aircraft's autopilot or thrust management systems. The Flight Director works in conjunction with these systems to direct the pilot on how to adjust the aircraft's heading and altitude but does not directly manipulate engine power or thrust levels.

Thus, the correct response indicates that controlling engine thrust is a function separate from what the Flight Director is responsible for, highlighting the distinct roles these systems play in flight management.