When is High Pressure considered operationally empty?

High pressure is considered operationally empty at 200 psi. This designation indicates the minimum pressure level at which the system can function without risking damage or reduced performance. If the pressure were to drop below this level, it could lead to insufficient system functionality or inadequate performance during operations.

Understanding the specific pressure parameters is crucial for flight safety and system reliability. In operational contexts, maintaining the correct pressure levels ensures that the aircraft's systems are working optimally. The other pressure options, while they may represent different states of pressure, do not correspond to the established operational empty status, which is critically defined at 200 psi. Using these predefined pressure limits helps pilots and crew members make informed decisions regarding aircraft safety and maintenance before flight operations.