What is the designed fuel supply duration for each engine from the feed tanks?

The designed fuel supply duration for each engine from the feed tanks is set at 30 minutes. This specification is crucial because it ensures that the engines have a reliable fuel supply during critical phases of flight, such as takeoff and initial climb, and it provides a buffer for controlling emergencies or navigating to alternate landing sites if necessary.

The 30-minute duration is a standard reference that reflects the need for operational safety and efficiency while allowing adequate fuel management in various flight conditions. Understanding this time frame is essential for crew members to ensure preparedness in case of any unplanned events that may require extended engine operation without immediate access to the main fuel supply.