What is the APU psi when temperatures are above -15 degrees F?

When temperatures are above -15 degrees Fahrenheit, the Auxiliary Power Unit (APU) should be set to a pressure of 2500 psi. This is the standard operational requirement for the APU in these temperature conditions, ensuring that it operates smoothly and efficiently.

Maintaining the correct psi level is vital for the proper functionality of the APU, as it directly impacts its performance and reliability. Operating outside of the recommended psi can lead to issues with starting or running the APU, potentially causing delays or malfunctions in the aircraft's systems that rely on it for power.

It's important to recognize that different temperature thresholds necessitate specific psi levels. In this case, 2500 psi is established as the safe and effective pressure for operations in warmer conditions, while higher psi values would apply in different environmental scenarios.