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15 Cards in this Set
- Front
- Back
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How is ice kept from forming on the pitot tube of an airplane? |
Pitot tubes are heated by electric current flowing through heater elements built into them.
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How can you tell, on a preflight inspection, that the pitot heater is operating? |
Turn it on for about a minute and then on the walk–around inspection, feel it to see that it is warm.
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Where can you find the correct part number for the electrically heated pitot head used on an aircraft?
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In the illustrated parts manual for the aircraft.
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If the pitot head includes ports for the static air system, what must be done after the head is replaced?
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A static system leak test must be performed and the results recorded in the aircraft maintenance records.
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Why is it important that ice not be allowed to build up on airplane wings in flight?
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Ice distorts the shape of the airfoil and destroys the aerodynamic lift. The weight of the ice loads the aircraft down.
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Are pneumatic deicer boots operated before ice forms, or after it has formed?
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Pneumatic deicer boots are not operated until ice has formed over them. When the boot inflates, it breaks the ice, and the air flowing over the airfoil blows it away.
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Where does the air come from to operate the pneumatic deicer boots on a reciprocating–engine powered airplane?
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From the discharge side of the air pump used to operate the gyro instruments.
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What is meant by a wet vacuum pump?
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It is a vacuum pump that uses engine oil to lubricate its steel vanes. A dry vacuum pump uses carbon vanes, and it does not required any oil for lubrication.
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What is the purpose of the oil separator in a deicer system?
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Oil separators are used with wet vacuum pumps to remove the lubricating oil from the discharge air before this air is used in the deicer boots.
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How are rubber deicer boots cleaned?
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By washing them with mild soap and water.
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How are rubber deicer boots attached to the leading edges of aircraft wings and tail surfaces?
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They are bonded to the surface with an adhesive. Boots on the older aircraft were attached with machine screws and Rivnuts.
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How is ice prevented from forming on the windshield of modern jet transport airplanes?
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The windshield has a heater element embedded in it. Electric current heats the windshield and keeps ice from forming on it.
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What are two ways rain can be kept from obstructing the pilot's vision through the windshield of an airplane?
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The rain can be blown away by high velocity blast of compressor bleed air, or it can be wiped away with electrically or hydraulically operated windshield wipers.
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When should rain repellent be used on an airplane windshield?
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Only when the windshield is wet with rain.
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Where can you find the instructions for adjusting the tension for the windshield wiper blades?
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In the aircraft maintenance manual. |
