Ice protection Flashcards
When is the Ice Detected message inhibited ?
On the ground by WOW logic
If anti-ice switches set to Auto, when will the Anti-Ice come on ?
Anytime ice is detected above 1500AGL to FL350
When does the amber Ice Detected CAS message extinguish ?
If ice accumulation is < 0.20” for one minute
Where is wing anti-ice exhausted overboard ?
Hot air flows through the leading edges of each wing, passes through the main wheel well, and then exits out of center vent underneath and between main wheels.
What happens if the wing anti-ice is selected to ON ?
The WAI operates regardless of altitude, ice detection or whether the aircraft is in-flight or on the ground.
What do blue (cyan) wing anti-ice lines indicate on the Bleed / Anti-Ice synoptic page ?
Wing anti-ice temperature < or = 100F within two (2) minutes of system activation.
What do green wing anti-ice lines indicate on the Bleed / Anti-Ice synoptic page ?
Normal temperature (130F + or - 10F)
What does amber wing anti-ice lines indicate on ECS / PRESS synoptic page ?
Wing temperature is < 100F after two minutes from the time it’s commanded to ON or > 180F
What happens to cowl anti-ice if both ENG BLEED AIR switches are selected to OFF ?
Nothing - cowl anti-ice uses hot air ducted from the compressor
What happens to the cowl anti-ice valve with loss of electrical power to hold it closed ?
It spring loads open.
Where is cowl anti-ice exhausted overboard ?
Underside of the engine nacelle.
What is the purpose of the probe heat OVRD position on the PROBES HEAT switch ?
It allows the heating of the AOA probes and TAT-SAT probe while on the ground.
Will the TAT-SAT probes receive heat while on the ground if the PROBES HEAT switch in the AUTO ?
No, they are off on the ground.
What areas are protected from icing ?
Wing leading edges
Engine cowl inlets
Windshields
Probe sensors
When is wing anti-ice prohibited ?
WAI is not recommended above 10C TAT or below -40C TAT to prevent ITT exceedance.
WAI operation mode is restricted to manual operation.
