The aural tone that sounds when the autopilot disengages can be cancelled by a second actuation of which control(s)?

• A. Autopilot disengage switch
• B. All the answers are correct
• C. Trim Interrupt Switch
• D. AP Disconnect Button

Answer: (B)

When the autopilot disengages, an aural tone is produced to alert you of the disengagement. To silence that tone, you need to issue another command that resets or interrupts autopilot control. A second actuation of the autopilot disengage switch sends another disengage signal, so the autopilot is clearly not active and the tone is cleared. The AP Disconnect Button serves the same purpose by disengaging the autopilot again, which stops the tone. The Trim Interrupt Switch, used to manually override autopilot and trim, also interrupts autopilot control; pressing it again cancels the ongoing tone as the system returns to manual control. Because any of these inputs can reissue a disengage/interrupt signal to the autopilot, all of the listed controls can cancel the aural disengagement tone.