Final answer:
The three ways to disconnect auto thrust typically include pulling the thrust levers to idle, pressing the instinctive disconnect push button, and pressing the auto thrust disconnect button on a control interface. Engaging or disengaging the autopilot does not usually disconnect auto thrust.
Step-by-step explanation:
The auto thrust system, which is part of an airplane's auto flight system, can generally be disconnected in several ways, depending on the specific aircraft model. However, for many aircraft, including those manufactured by Airbus and similar to the typical operations of an autopilot, the three ways to disconnect auto thrust include:Pulling the thrust levers to idle.
Pressing the instinctive disconnect push button on the thrust levers. Disengaging the autopilot does not typically disconnect the auto thrust, instead, another typical action could be pressing the auto thrust disconnect button on the flight control unit or similar interface.
It is important for pilots to know these procedures to maintain control of the aircraft in various flight situations. Engaging the autopilot, resetting the trim, or pushing the thrust levers to maximum are not standard methods for disconnecting auto thrust.