B737-Ice Protection

  1. What does an illuminated window OVERHEAT light indicate?
    The respective window has overheated; power removed from window.
  2. What does the OVHT position of the WINDOW HEAT test switch provide?
    Simulation of window overheat condition that illuminates all OVERHEAT light if all WINDOW HEAT switches are ON.
  3. What does an illuminated amber light on the PITOT STATIC heater panel indicate?
    Corresponding component not heated.
  4. How is an engine anti-ice valve controlled and operated?
    DC controlled & pneumatically operated
  5. What is the source of bleed air for engine anti-ice?
    5th or 9th stage bleed air, prior to the engine bleed valve.
  6. What does an illuminated amber COWL ANTI-ICE light indicate?
    Excessive pressure or temperature in duct between cowl anti-ice valve and cowl leading edge lip.
  7. Which statements correctly describe an illuminated COWL ANTI-ICE light?
    The light indicates excessive pressure of temperature in the system, but the cowl valve does not close automatically.
  8. Which ENGINE START switch position should be selected for operating in light icing conditions?
  9. What is the source of bleed air for wing anti-ice?
    Pneumatic manifold air after the engine bleed valve.
  10. What occurs when the WING ANTI_ICE switch is placed to ON?
    AC power operates motors which open each wing anti-ice valve.
  11. What is the power source for the wing anit-ice valves?
    Normal AC
  12. What does a dim WING ANTI-ICE VALVE OPEN light indicate?
    Respective wing anti-ice control valve is open with the switch ON.
  13. What happens when either thrust lever is moved beyond the takeoff warning threshold with wing anti-ice operating on the ground?
    Both wing anti-ice valves close, but the switch remains ON.
  14. On the ground prior to liftoff, with the wing anti-ice switch ON, and the thrust levers advanced to takeoff power, the WING ANTI-ICE VALVE OPEN lights_______.
    Illuminate bright blue
  15. What does an amber COWL ANTI-ICE light indicate?
    A cowl anti-ice supply duct over-temp or over-pressure condition has occurred.
  16. the WING ANTI-ICE switch trips to OFF:
    At liftoff
  17. Window heat must be selected ON at least_____minutes prior to takeoff.
  18. What is the indication when an engine anti-ice switch is turned ON but the valve fails to open?
    The respective blue COWL VALVE OPEN light illuminates bright blue.
  19. The green WINDOW HEAT ON lights illuminate______.
    During a power test or when the window heat controller is supplying power to the window.
  20. TRUE or FALSE

    On the ground with the throttles advanced to takeoff power and wing anti-ice selected ON, the wing anti-ice valves close.
  21. TRUE or FALSE

    With the window heat switch ON, an illuminated amber window OVERHEAT light indicates an overheated window condition or a power loss to the window.
  22. The engine anti-ice system______.
    Heats the engine inlet cowl.
  23. TRUE or FALSE

    Conditions: A cold front has moved through the area, the temperature is 4 degrees C and the skies are clear. Additionally, the ramp area and taxiways have standing water. Engine and wing anti-ice should be turned on after engine start.
  24. TRUE or FALSE

    The aircraft is descending through clouds from FL290 to FL180. The SAT is -42 degrees C. Engine anti-ice is required.
  25. TRUE or FALSE

    The ATIS temperature is 9 degrees C and a light rain is falling. After engine start, the wing and engine anti-ice should be turned on.
  26. Should the window heat POWER TEST be performed when all green ON lights are illuminated?
  27. The horizontal stabilizer is anti-iced by______.
  28. Will the engine anti-ice operate with that engine's bleed valve closed?
  29. What part of the wing is heated by the wing anti-ice system?
    Slats only
  30. Which cockpit windows are not electrically heated by the window heat system?
    L3 & R3
Card Set
B737-Ice Protection
B737 ice protection systems