Anti Ice Rain

Question 1

What are the components of the rain removal system?

Answer 1

Windshield wipers and hydrophobic coating on the windows

Question 2

Which external probes, vanes, ports, antennas, etc. are electrically heated?

Answer 2

PITOT, ELEV PITOT, ALPHA VANE, and TEMP PROBE Each has an associated light.

Question 3

Which Flight Deck windows are heated?

Answer 3

Flight Deck Windows 1 and 2 (Captain and First Officer)

Question 4

What causes the ON (green) lights and OVERHEAT (amber) lights to illuminate and extinguish?

Answer 4

a. ON: power is being applied to the respective window. Extinguish if switch OFF, system failure, a
window overheat.
b. OVERHEAT: window temperature exceeds the predetermined level, Extinguish when cooled.

Question 5

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

Answer 5

Engine cowl lip

Question 6

How is heat provided for engine anti-ice?

Answer 6

5th and 9th stage engine bleed air prior to Bleed shutoff valve

Question 7

How does the system operate?

Answer 7

Individual ENG ANTI-ICE switches.

Question 8

What is the logic associated with ENG ANT-ICE positioned to ON?

Answer 8

TAI (green/amber) is displayed above N1 indication on Engine Display, sets stall warning logic for icing
conditions whilst on

Question 9

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

Answer 9

Excessive pressure (greater than 65 psi) in the duct leading from the Cowl Anti-Ice Valve to the cowl
lip

Question 10

When does it illuminate/extinguish?

Answer 10

Excessive pressure (greater than 65 psi)

Question 11

What does a COWL VALVE OPEN bright blue light indicate?

Answer 11

In transit or disagrees with the ENG ANTI-ICE switch position

Question 12

Dim blue?

Answer 12

Valve is open with the switch ON

Question 13

Extinguished?

Answer 13

valve is closed and the switch is OFF

Question 14

What does an amber TAI indication above the engine N1 gauge mean?

Answer 14

Cowl Anti-Ice Valve fails to move to commanded position

Question 15

A green TAI?

Answer 15

Anti-Ice Valve is open,

Question 16

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

Answer 16

3 inboard leading edge slats

Question 17

How is heat provided for wing anti-ice?

Answer 17

Bleed Air, controlled by Wing A/Ice sw.

Question 18

What is the logic associated with WING ANT-ICE positioned to ON? Off?

Answer 18

a. Ground, opens valves if: - thrust on both engines is below takeoff setting and no duct
overtemperature
b. Flight: Opens if no duct overheat and sets stall warning logic for icing conditions for remainder of
flight

Question 19

. How is wing anti-ice operation/logic different for ground ops vs in-flight?

Answer 19

Gnd: Lower overheat threshold, switches off when airborne

Question 20

What does a Wing Anti-Ice L or R VALVE OPEN bright blue light indicate?

Answer 20

Valve In transit or disagree

Question 21

Dim blue?

Answer 21

Valve open switch on (agrees)

Question 22

Extinguished

Answer 22

Valve closed switch off (agrees)

Question 23

With the PROBE HEAT switches in AUTO, under what conditions will heat be applied to probes?

Answer 23

After 1st Engine start

Question 24

What do CAPT PITOT, L/R ELEV PITOT, L/R ALPHA VANE, TEMP PROBE, and AUX PITOT amber lights indicate?

Answer 24

Electrical power not provided to respective sensor