If the primary trim switches on the yoke are activated while the autopilot is engaged, what happens?

• A. The autopilot disconnects
• B. The yoke trim continues to follow manual input
• C. The autopilot remains engaged
• D. The autopilot switches to altitude hold

Answer: (A)

When you actively trim with the yoke while the autopilot is holding the airplane, that trim action is treated as a direct manual control input. The flight control system is designed so manual trim input takes priority over the autopilot to avoid the autopilot fighting your commands. As a result, the autopilot disengages, and control passes back to you. This prevents conflicting signals between the trapped autopilot’s stabilizer position and your manual trim request.