What action should be taken if a pitch trim runaway is suspected during takeoff?

When a pitch trim runaway is suspected during takeoff, pressing and holding the autopilot/trimming disc button is the appropriate action to take. This button is designed to disconnect the autopilot and disengage the trim system, allowing for manual control of the aircraft to stabilize it.

In a pitch trim runaway situation, the aircraft can become difficult to control as the trim continuously adjusts the aircraft’s elevator position, potentially leading to an uncontrollable pitch situation. By holding the AP/TRIM disc button, manual control of the aircraft can be regained, allowing the pilot to manage the aircraft’s ascent or descent without the interference of the runaway trim system.

This action is critical to maintain control and ensure the safety of the flight. Other options, although they might seem relevant in different scenarios, do not specifically address the challenge posed by a pitch trim runaway during takeoff.