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8 Cards in this Set

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  • Back
What probes are heated by the electrical anti-icing system and when do they operate
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
Is normal operation of the Ice Detectors possible on the ground
The system detects accumulation on the ground but only accurately above 29 kts
What is the restriction with regard to wing anti-ice when selected to auto
In the auto mode it is prevented from functioning below 400 ft AGL
What role does the Bleed Mgt Controller (BMC) play in the anti-ice system
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
Which stage provides bleed air to the cowl anti-ice system
What is the method of preventing ice build up on the engine spinner
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
What happens when electrical power is lost to the cowl anti-ice valves
They fail open
Describe the manner in which temperature is regulated to the windshield and window segments during the warm up cycle
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