B727 Questions Ice & Rain Protection
Revised 28-Feb-2001
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  1. Ice build-up will cause airflow disturbance on the leading edge but not on the leading edge
  2. To prevent ice from being ingested in the engines, What is anti-iced.
  3. Each wing anti-ice switch controls how many valves
  4. Normal operation of the wing anti-ice system is prevented on the ground by what
  5. To operate the wing anti-ice system on the ground, How and what position.
  6. A green valve position light indicates that the wing anti-ice switch and the valve it controls are what
  7. An overheat condition in the wing anti-ice system is indicated by
  8. If an overheat of the wing anti-ice system occurs during a ground test, what happens.
  9. In flight. An overheat of the wing anti-ice system will do what.
  10. The multi-use temperature gauge on the anti-ice panel shows the temperature where.
  11. Schematically, the positions of the anti-ice temperature sensors is show how on the control panel.
  12. Anti-ice protection is provided on each engine.
  13. Hot bleed air is supplied to the inlet guide vanes and nose dome on each engine via what.
  14. In the nose dome, air is directed to anti-ice what else.
  15. Anti-icing the cowl of number two engine is more difficult for what reason.
  16. One of the two valves which control anti-ice air to the number two cowl controls what, while the other controls.
  17. Temperature sensors in the number two cowl provide for what.
  18. Each engine anti-ice switch controls valves for what
  19. In the position labeled "right" on the valve position selector, what valves are monitored.
  20. The windshield and cockpit windows are heated for what reason.
  21. Cracks in the glass panels require what.
  22. Window heat switch Ll controls heat to which windows.
  23. To indicate that a window is being heated (200 series), what indication.
  24. If a window has reached operating temperature. The indicator light will do what.
  25. To check that all window heaters are operating the test switch is moved to what position.
  26. To check the operation of the window heat overheat systems the test switch is moved to
  27. An overheat of a window will cause what to happen.
  28. The heaters to the stall warning sensors are turned off under what conditions.
  29. How is the windshield wiper operated.


  1. Slats, Flaps
  2. Inboard leading edge Flaps, upper VHF antenna
  3. Check Answer
  4. landing gear safety switch
  5. wing anti-ice, ground test
  6. agree
  7. a multipurpose duct overheat light.
  8. Overheat light illuminates, wing anti-ice valve closes
  9. illuminate the overheat light
  10. wing anti-ice duct. Engine two cowl anti-ice duct
  11. circled T's
  12. inlet guide vanes, nose dome. Cowl
  13. two electrically controlled valves
  14. PT2 probe
  15. long curved inlet
  16. all hot air, only high stage bleed air
  17. temperature indication, overheat protection
  18. engine, cowl
  19. right. All three engines
  20. increase strength, provide anti-icing and defogging
  21. certain pressure considerations, subject to the failed pane
  22. left windshield and left eyebrow windows
  23. green light, illuminates
  24. goes out
  25. power on test
  26. overheat test
  27. overheat light to illuminate. Window heat to turn off
  28. the APU is powering the buses, external power plugged in
  29. Electric, separate motor per wiper.
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