Ice And Rain

Question 1

List the conditions when wing anti ice is available (Ground, Air and LE extended)

Answer 1

Ground/LE flap extended:
-Wing anti ice is OFF regardless of icing conditions.

Air:
Auto- anti ice ON when the icing conditions detection system detects wing icing conditions.
ON- anti ice on regardless of icing conditions.

Question 2

List the conditions when engine anti ice is available. (Ground, Air)

Answer 2

Ground:
AUTO- engine anti ice is OFF
ON- engine anti ice is ON

Air:
AUTO- anti ice on when the icing conditions detection system detects engine nacelle icing conditions.
ON- anti ice ON regardless of icing conditions.

Question 3

Describe the engine anti ice and wing anti ice indications on EICAS.

Answer 3

EAI green- engine anti ice valve open.

WAI green- Wing anti icing valve is open.

Question 4

How are icing conditions detected?

Answer 4

Detects engine nacelle inlet icing conditions and wing icing conditions in flight. Two probes in forward fuselage.

Question 5

What is the source of air for engine anti ice with the engine bleed valve closed?

Answer 5

HP bleed air available at low thrust settings.

At higher thrust settings, HP valve will remain closed and IP bleed air will be supplied for EAI.

Question 6

Identify the windows that have anti icing protection.

Answer 6

Flight deck windows:
Forward windshield.

Flight deck windows are electrically heated.

Forward windows have anti icing protection on the exterior surfaces and anti fogging heating on the interior surfaces.

The side windows have controlled anti fogging heating on the interior surfaces.

Question 7

How are the side windows heating controlled and when are they heated?

Answer 7

Side window heating is automatic and no flight deck controls are provide. Powered whenever The AC electrical system is powered.

Question 8

How does pushing the window heat switch OFF for 10 seconds, then ON, affect the associated windshield heat control?

Answer 8

Resets a windshield heat controller fault.

Question 9

Explain the windshield wiper selection options.

Answer 9

Continuous: LO and HIGH.

Intermittent (slow speed)

OFF

Question 10

Where is the source of windshield washer fluid?

Answer 10

Washer fluid is located behind the door in the book stowage area on the captain side panel.

Question 11

Which probes are heated on the ground after running?

Answer 11

4 pitot-static probes and 2 AOA probes electrically heated with any engine running.

Question 12

Which probes are not heated on the ground?

Answer 12

Two TAT probes electrically heated in flight.

Question 13

When the window heat controller senses a fault, what would be the EICAS message shown?

Answer 13

HEAT WINDOW L, R