Lower Console Cooling
Ice Detector System
Engine Anti-Ice System
Windshield Anti Ice
Blade De-ice
100
This is what the "air conditioning" operated from?
What is the ECS Control Panel?
100
This is the frequency at which the ice detector probe normally vibrates.
What is 40 KHz?
100
The thermal switch closes at this tempurature.
What is 200 degrees F.
100
The windshields are maintained at this tempurature.
What is 70-115 F?
100
"T" "L" "M" on the de-ice control panel stand for what?
What is Trace, Light, Moderate.
200
This part of the ECS is where the actual cooling of air takes place.
What is the air cycle machine?
200
This component translates probe frequency changes.
What is the Ice Rate Signal Converter?
200
At what Gas Turbine Speed does the "Engine Anti Ice On" capsule extinguish?
What is 88-92% NG
200
In auto mode, these relays are responsible for routing power to the windshields for anti ice.
What is k57 and k88?
200
These monitor current for tail and blade heaters.
What are transformers T18 and T19.
300
This electro-mechanical component is responsible for mixing cool and hot air to achieve desired tempurature.
What is the cabin temp control valve?
300
This component physically protects the Ice Detector Probe.
What is the aspirator?
300
This component mechanically holds engine anti ice valve open during engine start.
What is the Hydro Mechanical Unit. (HMU)
300
copilot windshield anti iceing power comes from this bus.
What is the AC secondary bus?
300
This is the max current range allowed on any phase during de-ice.
What is 57.95 to 64.05 amps?
400
This component is the "brain" whenever ECS in in "auto".
What is the ECS controller?
400
This unique indication occures when the heater for the probe has failed.
What is *flashing* ice detect fail on wca panel.
400
The engine inlet anti ice valve may or may not be open at this outside air tempurature.
What is 39 F to 55 F.
400
How much power flows to the center windshield for anti-ice?
What is ZERO volts.
400
This is the reference voltage employed on each pulse train.
What is -3 to -7?
500
With ECS set to "high", what is the position and power state of the Modulating Valve Solinoids?
What is "solonoid A de-energized" and "solonoid B energized".
500
When de-ice control panel switch is set to "test", this much time will pass before probe becomes hot.
What is 25-27 seconds?
500
During flight over the mountains, the pilot reports a "no.1 engine inlet anti ice on". He insiste that the engine anti ice switch was in the OFF position the entire time and the breaker was closed. What is the likely cause?
What is no power at no.1 inlet anti ice valve. (I.E. open wire, internally open valve.)
500
When reading out the resistors in the windshield, what is the maximum resistence allowed with an outside air temp of 60 F?
What is 155 ohms.
500
This is the shortest possible element off time during blade de-ice.
What is 150 milliseconds?
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