Which mode is engaged by the SPEED pushbutton?

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Multiple Choice

Which mode is engaged by the SPEED pushbutton?

Explanation:
The SPEED pushbutton activates the airspeed control modes used by the autopilot/auto-throttle during different flight phases. When you push it, the system switches to a target-speed mode and uses CLB during climbs or DES during descents to drive the aircraft toward the commanded speed. In other words, it tailors thrust and pitch to reach the selected speed, whether you’re climbing to a higher altitude or descending to a lower one. This is distinct from GA (go-around), NAV (navigation track), or HDG (heading hold) modes, which are triggered by different controls or actions and handle different aspects of flight guidance. So, the SPEED pushbutton is best understood as selecting CLB or DES depending on whether you’re in a climb or descent, to reach the commanded airspeed.

The SPEED pushbutton activates the airspeed control modes used by the autopilot/auto-throttle during different flight phases. When you push it, the system switches to a target-speed mode and uses CLB during climbs or DES during descents to drive the aircraft toward the commanded speed. In other words, it tailors thrust and pitch to reach the selected speed, whether you’re climbing to a higher altitude or descending to a lower one. This is distinct from GA (go-around), NAV (navigation track), or HDG (heading hold) modes, which are triggered by different controls or actions and handle different aspects of flight guidance. So, the SPEED pushbutton is best understood as selecting CLB or DES depending on whether you’re in a climb or descent, to reach the commanded airspeed.

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