Anti-ice/ Rain Flashcards
Selecting the engine Anti-ice switches to ON does what?
The anti-ice valves open to heat the leading edge of the engine cowling
The engine EECs reset the engine idle speed to approach idle speed
The stall warning logic adjusts stick shaker and minimum maneuver speed bars on the airspeed indicator
When does engine anti-ice not need to be used?
During climb and cruise below -40C SAT
What does the COWL VALVE OPEN light indicate?
When it is in its bright mode it means the anti ice valves are in transit. Once they’re completely open it becomes a dim blue, this happens simultaneously with a TAI (thermal anti ice) on the N1 display.
An amber TAI on the N1 means what?
The anti-Ice valve disagrees with the selected switch position
An amber COWL ANTI-ICE light indicates what?
An over pressure situation exists down stream of the cowl anti-ice valve
Which part of the leading edge are not heated by the anti ice system?
The wing inboard of the engine. The outermost slat on each side (slat #4)
Do not operate engine or wing anti-ice when the OAT is above ____
10C (50F)
Can the wing anti-ice be used during takeoff?
No, the wing a anti-ice must be selected off prior to beginning the takeoff roll.
It will automatically close if takeoff thrust is set
What two conditions cause the OVERHEAT to illuminate for the window heat?
The temperature of the window exceeded a predetermined limit.
Electrical power to the window is interrupted
Which probes are electrically heated?
Alpha vanes (2)
Pitot probes (3)
Temperature probe
Elevator pitot probe (2)
When the probe heat is in AUTO, when do the probes begin heating?
When either engine is running
Probe A system heats what?
Captains pitot
Left alpha vane
TAT probe
Left elevator pitot
Probe B system heats what?
First officer pitot probe
Right alpha vane
Aux pitot probe
Right elevator pitot
