Final answer:
The question seeks to know the minimum oil pressure required in flight above FL230, a subject related to aeronautical engineering and aircraft operation. However, without specific contextual information, providing an accurate answer is not possible.
Step-by-step explanation:
The question relates to aircraft systems, specifically the minimum oil pressure required in flight above flight level 230 (FL230). This is a technical topic related to aviation, engines, and aircraft operation that falls under the category of aeronautical engineering. The specific minimum oil pressure value might vary depending on the aircraft model and manufacturer guidelines, so without the specified standard or context provided in the question, it's impossible to provide an accurate answer.
Oil pressure is crucial for the safe and efficient operation of the aircraft engine, as it ensures that engine components stay lubricated and cool under the operational stress of flight. Assuring that the oil pressure stays within the required limits helps prevent engine failures and contributes to the overall safety of the flight.