Term
| What happens when the nacelle anti-ice switches are turned ON? |
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Definition
NAI valve opens (with bleed air available)
PRV opens
Continuous ignition |
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Term
| What conditions would prevent the PRV from opening when nacelle anti-ice is on? |
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Definition
Prior or present bleed air overheat
Start valve not closed
HP bleed air valve failed open |
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Term
| How do the NAI valves function in AUTO on the ground (during icing conditions) prior to takeoff? After landing? |
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Definition
Prior to takeoff: closed
After landing: valves remain open until engine shutdown |
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Term
| When do the window heat INOP lights illuminate? |
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Definition
Overheat
Controller fault
Power removed from windshield |
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Term
| Can the wing anti-ice system be operated on the ground? |
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Definition
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Term
| If the engine bleed air valve is closed, and nacelle anti-ice is commanded, what is the source of bleed air for nacelle anti-ice? |
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Definition
| IP bleed only (HP bleed valve remains closed) |
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Term
| Is wing anti-ice effective with the leading edge flaps extended? |
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Definition
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Term
| Where is it displayed when nacelle anti-ice and/or wing anti-ice valves are open? |
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Definition
| NAI or WAI on primary EICAS N1 display |
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Term
| Describe anti-ice and anti-fog for the forward and side windows |
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Definition
Forward: overhead switches, anti-ice and anti-fog
Side: automatic when AC power is on aircraft, anti-fog only |
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Term
| How many probes are provided? When are they heated? |
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Definition
4 pitot-static probes
2 AOA probes
-heated when any engine is operating
2 TAT probes
-only heated in flight
2 ice detection probes |
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Term
| >ANTI-ICE NAC/WING caution |
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Definition
| System is ON and TAT>12°C |
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