Can a pilot over-torque the engine above 2230 ft-lb with the autothrottles engaged and pneumatic torque-limiters operative?

The statement that it is not possible for a pilot to over-torque the engine above 2230 ft-lb with the autothrottles engaged and pneumatic torque-limiters operative is supported by the functionality of these systems. The autothrottle system is designed to automatically adjust the engine power to maintain a specified torque limit during operations. When the pneumatic torque-limiters are functioning properly, they act to physically prevent the torque from exceeding safe limits. This means that even if a pilot were to apply full throttle, the combination of the autothrottle system and torque-limiters would ensure that the engine torque does not surpass the designated threshold.

Therefore, the systems in place are designed for safety, ensuring that the aircraft operates within its limits under various conditions, thus making over-torquing impossible in this scenario.