If a PT6A-20 engine is used with a reversing propeller application, what governor type must be used?

The correct answer indicates that a specific type of propeller governor, the Woodward Propeller Governor Type X210XXX, is required for use with a reversing propeller application on a PT6A-20 engine.

In the context of this engine and its operation, reversing propellers allow for more effective deceleration and control during descents and landings by reversing the thrust direction. The governor's role is critical in managing the propeller blade pitch effectively to achieve the correct thrust settings for takeoff, cruising, and reversing.

The Woodward governor is specifically designed to handle the unique demands of a reversing propeller system, including managing the changes in pitch smoothly and efficiently, which may not be the case with other governor types. This is crucial for safety and performance, as improper governor functionality could lead to loss of control or adverse effects on the engine operation.

While other types of governors exist, they may not support the full range of operational requirements specific to reversing propellers on this engine. Therefore, only the Woodward governor is specified for this application. The choice suggesting that the engine could not be utilized with a reversing propeller fundamentally misunderstands the design capabilities of the PT6A-20 in conjunction with the appropriate governor technology.