What is the memory item for responding to a roll trim runaway?

The appropriate action for responding to a roll trim runaway in the ERJ cockpit involves pressing and holding the AP/TRIM Disc button. This is a critical memory item because it effectively disconnects the autopilot and disengages the roll trim system. By doing so, the pilot can regain manual control of the aircraft and stabilize the situation.

This action is designed to quickly address the situation, allowing the pilot to focus on flying the aircraft manually, which is essential when experiencing a roll trim runaway. It serves as a crucial first step in managing the issue and preventing any greater loss of control.

The other choices do not provide the correct immediate response required to handle a roll trim runaway. They either suggest actions that do not directly address the trim runaway or describe situations that are not as closely related to addressing the immediate danger posed by the condition.