How long after disengaging auto-throttle is Guard Mode available?

Guard Mode is a safety feature that allows for manual control and protection of the aircraft's systems after the auto-throttle has been disengaged. When auto-throttle is turned off, it typically takes a brief moment for the aircraft's systems to reset and prepare for manual inputs. In this specific scenario, Guard Mode becomes available 3 seconds after the disengagement of auto-throttle.

This time frame is crucial as it ensures that the pilot has sufficient time to prepare for manual throttle management, thereby enhancing operational safety. The 3-second window provides a buffer that prevents immediate changes to engine power settings, allowing the pilot to stabilize the aircraft before assuming full control. Understanding this mechanism is essential for pilots to effectively manage throttle control and aircraft performance in different phases of flight.