Anti-Ice, Rain

Question 1

Window OVERHEAT Lights

Answer 1

Overheat condition is detected

Question 2

Window Heat OFF Lights

Answer 2

• Switch is OFF or
• an overheat is detected or
• a system failure has occurred or
• system is at correct temp or
  extinguished = window heat is being applied to the selected windows

Question 3

Probe Heat Lights

Answer 3

related probe not heated

IF: operating on standby power, probe heat lights do not indicate system status

Question 4

COWL ANTI-ICE lights

Answer 4

indicates an overpressure condition in duct downstream of engine cowl anti-ice valve

Question 5

COWL VALVE OPEN lights

Answer 5

Bright Blue: related cowl anti-ice valve is in transit, or cowl anti-ice valve position disagrees with related ENGINE ANTI-ICE switch position

DIM BLUE: related cowl anti-ice valve is open (switch ON)

Extinguished - related cowl anti-ice valve is closed (switch OFF)

Question 6

ENGINE ANTI-ICE Switches

Answer 6

ON:

• related cowl anti-ice valve is open
• stick shaker logic is set for icing conditions

OFF:

• related cowl anti-ice is closed
• stick shaker logic returns to normal if wing anti-ice has not been used in flight

Question 7

Wing Anti-Ice VALVE OPEN lights

Answer 7

Blue Bright: related wing anti-ice control valve is in transit, or related wing anti-ice control valve position disagrees with WING ANTI-ICE switch position

DIM: related wing anti-ice control valve is open (switch ON)

Extinguished: related wing anti-ice control valve is closed (switch OFF)

Question 8

WING ANTI-ICE Switch

Answer 8

OFF - wing anti-ice control valves are closed
ON in the air:
- wing anti-ice control valves are open
- stick shaker logic is set for icing conditions (stick shaker logic remains set for icing conditions for the remainder of the flight)
ON on the ground:
- switch trips OFF at lift-off
- wing anti-ice control valves open if thrust on both engines is below takeoff warning setting and temperature inside both distribution ducts is below thermal switch activation temperature
- control valves close if either engine thrust is above takeoff warning setting or thermal switch is activated in either distribution duct. Switch remains ON

Question 9

What window(s) does the FWD WINDOW HEAT switch control?

Answer 9

Window #1

Question 10

What window(s) does the SIDE WINDOW HEAT switch control?

Answer 10

Window #2 / #3

Question 11

Temperature controllers maintain what window(s) ?

Answer 11

Temperature controllers maintain windows #1/2 at the correct temperature to ensure maximum strength of the windows in the event of a bird strike

Question 12

Thermal Switches control what window(s)

Answer 12

Window #3, open and close to maintain the correct temperature.

Question 13

Pitot probes, the TAT, and the alpha vanes are heated how?

Answer 13

electrically

Question 14

When on standby power what probe(s) are powered?

Answer 14

only the captains pitot probe is heated

Question 15

Engine bleed air thermal anti-ice prevents the formation of ice on the ?

Answer 15

Engine cowl lip / 3 inboard leading edge slats

Question 16

Each cowl anti-ice is (blank) controlled and (blank) actuated

Answer 16

electrically / pressure

Question 17

If the engine anti-ice is moved to OFF what happens?

Answer 17

Stall warning logic, airspeed indications, and min maneuver speed on the airspeed indicator return to normal as long as wing anti-ice has NOT been used

Question 18

The wing anti-ice system provides protection for what? what doesn’t it protect?

Answer 18

protection for the 3 inboard leading edge slates with bleed air.
DOES NOT protect the leading edge flaps or the outboard leading edge slats

Question 19

The wing anti-ice control valves are powered how?

Answer 19

AC motor-operated

Question 20

What happens at liftoff if the WING ANTI-ICE switch is on?

Answer 20

The WING ANTI-ICE automatically trips off when the air/ground sensor goes to the air mode

Question 21

Positioning the WING ANTI-ICE switch to ON in flight does what?

Answer 21

Opens both control valves

sets stall warning logic for icing conditions