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Related Flashcards
Cards In This Set
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Describe the operating principle of inflatable deicer boots.
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Pneumatic... Rubber inflatable boots that are attached to the leading edges of the wings and stabilizers that are alternately inflated to break away the ice that accumulates.
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What are two methods of inflating pneumatic deicer boots?
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Engine driven air pump or bleed air.
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What methods are used to attach deicer boots to the leading edges of wing and tail surfaces?
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Cement, Fairing strips and/or screws.
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What is the purpose of an air-oil separator in a pneumatic deicer system?
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To prevent the oil from deteriorating the rubber boots.
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What is used to clean deicer boots?
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Mild soap and water.
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What must be done before you can make a cold patch repair to a deicer boot?
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Relieved from its installed tension.
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What component of a pneumatic deicer system normally allows suction to be supplied to the boots to hold them down in flight?
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The solenoid distributor valve.
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Describe the operating principle for thermal anti-icing systems?
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Prevents ice from forming on the leading edges from hot air that passes between the skins.
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What methods are used to supply heated air for thermal anti-icing systems?
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Bleed air from turbine compressor.Engine exhaust heat exchangers.Ram air heated by combustion heater.
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How is overheating prevented in a thermal anti-icing system using bleed air?
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A thermal switch will cause a shut-off valve to close and stop the flow of bleed air.
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In a thermal anti-icing system, what happens to the air after it has heated the leading edge of the wing?
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Exhausted to the atmosphere at the wingtip or at points where ice formation could be critical.
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What problems are associated with electrically heated windshields?
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Delamination, arcing, scratches and discoloration.
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What is windshield delamination?
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Separation of the plies.
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What does arcing usually indicate in an electrically heated windshield?
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A breakdown in the conductive coating.
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Name the three methods of removing rain from aircraft windshields.
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Wipers, pneumatic systems, and chemical repellant.
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