B747f bleed air system - Study guides, Class notes & Summaries

B747F Bleed Air System Under what conditions would High Pressure (HP) air be used? - Answer- During descent and other low power setting operations. Under what conditions would Intermediate Pressure (IP) air be used? - Answer- During high power setting operations. Which valves does the Engine Bleed Air Switches control by system logic when bleed air pressure is available? - Answer- Engine bleed air valve, the HP bleed valve and the PRV (pressure regulating valve). Describe the general...