In the event of a trim runaway, what is the first action a pilot should take?

• A. Press the TRIM INTERRUPT switch just in front of the power control lever.
• B. Pull the circuit breaker for the trim system.
• C. Extend flaps to 0 degrees.
• D. Increase thrust to prevent a stall.

Answer: (A)

When a trim runaway occurs, the immediate goal is to stop the unintended trim movement so you can regain control of the aircraft. The best first action on the PC-12 NGX is to press the TRIM INTERRUPT switch, which sits just in front of the power control lever. This switch quickly disconnects the trim system from the actuators, halting further trim input and allowing you to manually control the airplane.

If the motion does not stop after interrupting the trim, you would follow subsequent procedures, such as addressing the trim circuit or other checklist steps. Options like extending flaps to zero degrees or increasing thrust do not address the root problem of the runaway trim and can complicate handling.