Anti-Ice, Rain

Question 1

Which flight deck windows are heated?

Answer 1

Front windows #1 and side windows #2 (aft flight deck windows not heated, four of six windows heated)

Question 2

What happens if an overheat condition is detected in a heated window?

Answer 2

-OVERHEAT (amber) light illuminates above respective window heat switch (62*C)
-Controller removes power to respective window
-Cannot be reset (switch off then on) until window cools sufficiently (2-5) min

*OVERHEAT light(s) also illuminate if electrical power interrupted

Question 3

What does the Engine Anti-ice system protect from icing?

Answer 3

Prevents the formation of ice on the engine cowl lip

Uses (5th and 9th NG) (4th and 10th Max) bleed air from the respective engine

Is available on respective engine regardless of bleed valve position

Question 4

How does the Engine Anti-Ice affect stall speed and engine thrust?

Answer 4

Sets stall warning logic for icing conditions. Adjusts stick shaker and minimum maneuver speed bars on airspeed indicator.

Logic returns to normal when switches turned off

VREF not adjusted

Increases engine idle for anti-ice demand

Question 5

What does a COWL ANTI-ICE (amber) light indicate?

Answer 5

Excessive pressure (>65psi) in the duct leading from the cowl anti-ice valve to the cowl lip

Question 6

What does the COWL ANTI-ICE OPEN bright blue light indicate?

Answer 6

Related Cowl Anti-Ice Valve is in transit or disagrees with the ENG ANTI-ICE switch position

Question 7

What does a green TAI (Thermal Anti-Ice) above the N1 readout indicate?

Answer 7

Engine Anti-Ice Switch is on and Anti-Ice Valve is open

Question 8

What does an amber TAI (Thermal Anti-Ice) above the N1 readout indicate?

Answer 8

Cowl Anti-Ice Valve fails to move to the position selected by the ENG ANTI-ICE switch

*does not appear Amber when I’m transit.

Question 9

What does the wing Anti-Ice System protect from icing?

Answer 9

Inboard 3 leading edge slats on each wing

Question 10

What is the difference between a dim blue and bright blue Wing Anti-Ice VALVE OPEN light?

Answer 10

Bright: related Wing Anti-Ice Valve is in transit or valve position disagrees with WING ANTI-ICE switch position

Dim: when the valve is open with the switch on

Question 11

What would cause the wing Anti-Ice valves to close automatically if selected ON while on the ground?

Answer 11

Both valves automatically close if:
—either thrust lever is advanced to takeoff power position (above setting for takeoff warning activation)
— either temp sensor senses over temp (157*C) on ground

Question 12

How does the Wing Anti-Ice System operate if selected ON for takeoff?

Answer 12

When thrust levers are advanced for takeoff, and the wing anti-ice system operating, the control valves are commanded closed and the solenoid controlled wing anti-ice switch will release to off once airborne

Question 13

How is aircraft stall protection logic affected when using the Wing Anti-Ice?

Answer 13

Sets stall warning logic for icing conditions. Adjusts stick shaker and minimum maneuver speed bars on airspeed indicator.

Stall warning logic remains set for the remainder of the flight, regardless of switch position.

VREF not adjusted

Question 14

Which external probes, vanes, ports, antennas, etc are electrically heated by the probe heat system?

Answer 14

-Captain and F/O Pitot
-Left and Right Elevator Pitot
-Left and Right Alpha vane
-Temp probe
-AUX Pitot (standby)

With switch in auto and one engine operating, probes heated.