# ICE PROTECTION

![](//cdn.document360.io/417c2d4d-fdb8-4d4d-b11d-011fe445d776/Images/Documentation/windshield-heating--ice-protection-panel-image-6etomjo0.png)

### WINDSHIELD HEATING (1) (2) BUTTON <a href="#toc118376447" id="toc118376447"></a>

**PUSH IN:** activates the respective windshield heating system. <mark style="color:red;">Only operates if there are at least 2 AC electrical sources. If only single AC power source is available only the left windshield heat is powered.</mark>

**PUSH OUT:** Deactivates the respective windshield heating system.

### ICE PROTECTION ENGINE (1) (2) BUTTON <a href="#toc118376448" id="toc118376448"></a>

**PUSH IN:** Automatic operation. Engine cowls are heated with high stage bleed from the respective engine.

**PUSH OUT:** Deactivates the respective engine anti-ice system.

![](//cdn.document360.io/417c2d4d-fdb8-4d4d-b11d-011fe445d776/Images/Documentation/windshield-heating--ice-protection-panel-image-bgkam3h9.png)

### WING ICE PROTECTION BUTTON <a href="#toc118376449" id="toc118376449"></a>

**PUSH IN:** Automatic operation. Allows wing anti-ice protection to operate according to the ice protection mode selector setting or MCDU setting. If 1 bleed air or one engine fails, xbleed valve automatically opens and uses opposite bleed for both wings.

**PUSH OUT:** Deactivates the wing anti-ice system.

### ICE PROTECTION MODE SELECTOR KNOB <a href="#toc118376450" id="toc118376450"></a>

**AUTO:** If an icing condition is detected during flight, the ice detectors command the wing and engine anti-ice valves to open and remain activated for 2 minutes after the icing condition is no longer detected.

* <mark style="color:red;">For taxi out and takeoff, anti-icing operation must be set in the MCDU.</mark>
* For taxi in, mode selector knob must be selected to ON if icing is anticipated or encountered.

**ON:**

* Inflight: Overrides system logic, activating the anti-ice system
* Ground: Activates the anti-ice on the ground.
  * Engine anti-ice whenever an engine is running
  * Wing anti-ice at wheel speed above 40kts

### ICE PROTECTION TEST SELECTOR KNOB <a href="#toc118376451" id="toc118376451"></a>

**OFF:** Spring-loaded position. Normal position.

<mark style="color:red;">Wing anti-ice system tests itself during flight 10min after takeoff or at 10.000ft AGL, whichever occurs first.</mark>

* <mark style="color:red;">EICAS message A-I WING VLV OPEN will be displayed</mark>


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