1. Under what conditions would High Pressure (HP) air be used?
    • • Descent
    • • Other low power setting operations 

    FCOM, VOL 2. 2.40.1
  2. Under what conditions would Intermediate Pressure (IP) air be used?
    • High power setting operations. 

    FCOM, VOL 2; 2.40.1
  3. The Engine Bleed Air Switches control which valves by system logic, when bleed air pressure is available?
    • • Engine bleed air valve
    • • PRV
    • • HP bleed valve 

    FCOM, VOL 2; 2.10.31
  4. Describe the general function of pressure regulating valve (PRV).
    • Prevents damage to ducting and equipment downstream, the PRV limits bleed air pressure. 

    FCOM, VOL 2; 2.40.2 and .1
  5. How are the engine bleed air valves actuated, and when do they open for forward flow?
    • • The bleed air valves are pressure actuated.
    • • They remain closed until engine bleed air pressure causes forward flow. 

    FCOM, VOL 2; 2.40.1
  6. With the HP valve failed open and the respective bleed air switch OFF, will nacelle anti-­‐ice be available?
    • No 

    FCOM, VOL 2; 2.40.2
  7. An Engine Bleed Air System (SYS) FAULT light indicates what?
    • • Bleed air overheat
    • • Bleed air overpressure
    • • HP bleed valve open when commanded closed
    • • PRV open when commanded closed 

    FCOM, VOL 2; 2.10.31   
  8. What does a bleed duct Isolation (ISLN) VALVE light indicate (amber)?
    • Isolation valve position disagrees with switch position 

    FCOM, VOL 2; 2.10.31
  9. What prevents reverse air flow into the engine compressor sections during engine start?
    • The PRV is positively closed 

    FCOM, VOL 2; 2.40.1
  10. What happens if the engine start valve fails to close?
    • • Bleed air is isolated from the engine starter
    • • The PRV remains closed
    • • The engine bleed air valve remains closed.
    • • Nacelle anti-­‐ice and thrust reverse are not available for the respective engine. 

    FCOM, VOL 2; 2.40.1; 2.40.2 (thrust reverse)
  11. What two valves close in the engine if a bleed air overheat is detected?
    • • PRV
    • • HP valve 

    FCOM, VOL 2; 2.40.2
  12. What conditions in the engine bleed air system would prevent nacelle anti ice operation when the bleed air switch is ON?
    • • The PRV has failed closed, or
    • • The PRV has been closed due to a bleed air overheat, or
    • • The start valve is not closed 

    FCOM, VOL 2; 2.40.2
  13. How would you isolate a bleed air duct section in the event of a bleed duct leak is detected?
    • • Close the respective isolation valve
    • • Close the engine bleed air valves. 

    FCOM, VOL 2; 2.40.3
  14. Do we normally operate with the Isolation Valves open or closed?
    • Open 

    FCOM, VOL 2; 2.40.3
  15. If the center duct is isolated, how is temperature controlled in all temperature zones?
    • • All temperature zones operate in backup temperature control mode
    • • Trim air is unavailable. 

    FCOM, VOL 2; 2.40.3   
  16. With a left or right duct isolated, how would the leading edge flaps extend on the affected side, and what EICAS Advisory message would display?
    • • The respective LEF operate electrically in secondary mode.
    • • FLAPS PRIMARY (until LEF extended) Ø FCOM, VOL 2; 2.40.3 How does an isolated left or right duct affect the hydraulic systems?
    • • The respective hydraulic demand pump 1 or 4 is turned off. 

    FCOM, VOL 2; 2.40.3
  17. What two systems use engine bleed air downstream in the engine prior to the engine bleed valve?
    • • Nacelle anti-­‐ice
    • • Thrust reverse 

    FCOM, VOL 2; 2.40.5 (diagram)
Card Set