Anti-Ice and Rain Flashcards
When the Nacelle Anti-Ice turns on (automatically or manually) what happens
- Nacelle anti icing valve opens when bleed air is available
- Engine igniters operate continuously
- Engine bleed PRV opens
Regarding the Nacelle Anti-ice system, what would inhibit the activation of the Nacelle anti ice? Even in the air with engines running?
PRV valve closed due to
1. Prior or present bleed air overheat
2. Start valve not closed
3. Engine bleed HP valve failed open
Can Wing anti-ice be operated on the ground?
No
When Wing Anti ice is activated ( automatically or manually) what happens?
Wing anti-icing valves open and supply bleed air to the left and right leading edges
There is an amber “valve” light below the wing and nacelle anti-ice buttons. If this illuminates what does this mean?
Wing: position of either wing anti ice valves disagrees with switch position
Nacelle: Position of nacelle anti icing valve disagrees with switch position
When does wing anti-ice seese to operate regarding configuration?
Leading edge flaps are extended
Green NAI or WAI messages displayed on the EICAS indicate what?
Nacelle anti ice or wing anti ice valves are open
What would cause a Window heat INOP amber light to turn on?
1.The switch is off
2. overheat has occurred
3. System fault
Windshield heat light on does what?
Supplies controlled heat to the windshield
How many ice detection probes are there and where are they located?
2 located on forward fuselage
When nacelle anti icing is commanded on but the engine bleed valve is closed, what happens?
The HP valve remains closed and bleed air for nacelle anti icing is supplied by the IP bleed only
Regarding probe heat, when and how are they heated?
4 pitot static probes and 2 AOA probes are electrically heated when any engine is operation
2 TAT probes are electrically heated whenever in flight
