If the rate of descent exceeds 1500 ft/min during an uncommanded prop feather, to what level should torque be increased?

When an uncommanded prop feather occurs and the rate of descent exceeds 1500 feet per minute, it's crucial to respond appropriately to maintain control of the aircraft. Increasing the torque to 131% in this scenario is necessary for managing the loss of thrust from the feathered propeller. This adjustment helps to compensate for the reduced power available due to the feathered propeller, ultimately stabilizing the aircraft's flight path and preventing excessive descent.

Maintaining a torque of 131% enables the pilot to generate additional power from the operating engine, allowing for better control and aiding in gaining altitude or reducing the descent rate. This response reflects an understanding of the aircraft's limitations and performance in emergency conditions, as well as the specific operational procedures outlined in the aircraft's operating manual.

Moreover, this torque level is specifically calculated to provide the necessary thrust without exceeding the engine's operational limits, thereby ensuring safety and optimal performance under the circumstances presented by an uncommanded prop feather.