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8 Cards in this Set
- Front
- Back
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What probes are heated by the electrical anti-icing system and when do they operate
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9 probes total, 4 Pitot, 2 AOA & 3 TAT Probes
All Pitot and AOA Probe Heaters are on when either engine is running. The TAT heaters are on with their repective engine running except TAT 3 which is on with weight off wheels |
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Is normal operation of the Ice Detectors possible on the ground
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The system detects accumulation on the ground but only accurately above 29 kts
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What is the restriction with regard to wing anti-ice when selected to auto
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In the auto mode it is prevented from functioning below 400 ft AGL
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What role does the Bleed Mgt Controller (BMC) play in the anti-ice system
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Once ice is detected by the controllers a signal is sent to the BMC's commnading the opening of the WAIV's. The L&R systems operate independently. The Wing Anti-ice System then modulates the respective WAIV in response to leading edge temp sensors
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Which stage provides bleed air to the cowl anti-ice system
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5th
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What is the method of preventing ice build up on the engine spinner
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The tip of the spinner is rubberized which distorts during engine operation. The rear of the spinner and the fan blades use centrifugal force to prevent accumulation
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What happens when electrical power is lost to the cowl anti-ice valves
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They fail open
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Describe the manner in which temperature is regulated to the windshield and window segments during the warm up cycle
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During the warm-up 33% heat is is applied to for approx 4 mins. This prevents thermal shock.
After the warm-up the normal operation is for the heat to be maintained between prescribed limits through a dual channel monitoring system |
