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13 Cards in this Set
- Front
- Back
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What surfaces are bleed air heated?
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-Wing and horizontal stabilizer leading edges.
-Engine air inlet lips |
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What surfaces are electrically heated?
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-Windshields, pilot tubes, and pitot-static tube
-Angle of Attack (AOA) sensors -Total Air Temperature (TAT) probes -Air Data Computer (ADC) static ports & Pressurization static ports |
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What section of the engine does the bleed air come from?
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Compressor section
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How is the bleed air ducted to the leading edge of the wings and the horizontal tail?
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The Piccolo tubes
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Wings use which side of the bleed air system? Which side does the horizontal stabilizer use?
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Wings use their respective side (left and right)
Horizontal stabilizer primarily uses left |
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What is the purpose of the Cross Bleed Valve?
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It opens automatically to ensure adequate airflow to both wings and the stabilizer
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When the Ice Detector is in the AUTO position, when will the ice protection system activate?
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-Any time at least one of the ice detectors sense ice on the ground and wheel speed is greater than 25 knots, or the airplane is in flight
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What thickness of ice buildup on the probe will the ice detector system detect? How does it work?
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.5mm, they vibrate ultrasonically and the ice buildup changes the frequency of the vibration
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What happens when you manually move the Anti-icing switch from AUTO to ALL?
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On the ground the engine lip anti-ice will be active with the knob in the ALL position, and the wing and stabilizer will be heated on the ground at a wheel speed of 25 knots or more, or in flight regardless of whether the detectors sense ice.
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Tell me about the windshield anti ice
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-Heated by an electric grid embedded in them.
-Buttons on the overhead panel control left and right windshield heating, and separate power supplies are provided for each. |
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What are the sensors on the windshield anti ice?
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One for temperature control, a second for overheat protection, and a third is a spare for use by maintenance personnel.
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What does the Sensor Heating System protect?
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Pitot tubes 1 & 2, Pitot/Static 3, Pressurization System & AD static ports, TAT sensors 1 & 2, and AOA vanes 1 & 2. All the sensors are electrically heated.
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What are the three functional logics of the Sensor Heating System when it is in automatic mode?
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1. Pitot 1 & 2 and Pitot/Static 3, AOA 1 & 2, ADC Static ports 1,2,3 & 4, and Pressurization static ports 1 & 2 are heated whenever at least one engine is running.
2. A separate logic assures Pitot/Static 3 and pressurization system static port 2 are heated in flight. 3. TAT 1 & 2 are heated if either engine anti-ice is functioning on the ground or the airplane is in flight |
