What is the role of the Scavenger Pump in the oil system?

The Scavenger Pump plays a crucial role in the lubrication system of the Pilatus PC-12 NG, particularly in managing the oil flow between the engine and its cooling system. Its primary function is to take oil from the reduction gearbox, which can accumulate oil during operation, and direct it to the oil cooler. This process helps maintain optimal operating temperatures for the oil, ensuring that it remains effective in lubricating the engine components.

By directing the oil from the reduction gearbox to the oil cooler, the Scavenger Pump helps prevent overheating and ensures that the oil is at a suitable temperature before it is recirculated back to the engine. This is vital for maintaining engine health and performance, as it ensures that all moving parts receive adequate lubrication, thereby minimizing wear and tear.

The other options suggest functions such as pumping oil from the oil cooler back to the engine, recirculating oil within the engine itself, or increasing oil pressure. While these functions are essential within the overall oil system, the specific role of the Scavenger Pump is focused on transferring oil from the reduction gearbox to the oil cooler, as stated in the correct response.