What is the primary hydraulic system and the power package reservoir pressurized to respectively?

The correct answer highlights the specifications of the hydraulic system and its accompanying power package reservoir. The primary hydraulic system typically operates at a pressure of approximately 3,000 PSI, with a tolerance of +/- 120 PSI. This range ensures that the system can effectively generate and manage the necessary force for operations, which include controlling flight surfaces and landing gear, among other critical functions.

The power package reservoir, which serves as a holding tank for hydraulic fluid, is pressurized to around 50 PSI. This pressure level is essential to maintain the proper flow and ensure that the hydraulic system functions efficiently without the risk of cavitation or fluid disruption.

Understanding these pressures is crucial for the safe operation and maintenance of the hydraulic systems in aircraft. The other options reflect different specifications that do not align with the industry standards for these systems, which is why they do not provide the correct parameters.