Ice and Rain Protection

Question 1

What are the two types of protection?

Answer 1

Electric and pneumatic

Question 2

Where is ice buildup prevented?

Answer 2

Wing leading edges
Engine cowl inlets
Windshields
Probe sensors
Aft drain mast

Question 3

Describe ice detection system.

Answer 3

It’s comprised of two independent systems
consisting of two ice detectors: one
mounted below pilot window and one
below copilot window.

Question 4

When does cyan Ice Detected CAS
message extinguish?

Answer 4

Ice accumulation < 0.02” for three (3)
minutes

Question 5

With switches in auto, when does
cowl and wing heat cease?

Answer 5

Approximately two (2) minutes after Ice
Detected message extinguishes; it varies.
Ref: Flight test verification / sim
certification

Question 6

Describe WAI system?

Answer 6

It consists of two independent control
systems, pneumatically linked via
crossover duct. One system provides WAI
for left wing and one provides WAI for
right wing.

Question 7

Where is WAI exhausted overboard?

Answer 7

Hot air flows through leading edge of each
wing, passes through main wheel well,
and through two screens aft of wheel well
on bottom of aircraft

Question 8

What happens when WAI is selected
to On?

Answer 8

WAI operates regardless of altitude or ice
detection.

Question 9

What do blue wing anti-ice lines
indicate on ECS/PRESS synoptic
page?

Answer 9

WAI temperature ≤ 100°F

Question 10

What do green wing anti-ice lines
indicate on ECS/PRESS synoptic
page?

Answer 10

Normal temperature (100 to 180°F)

Question 11

What do amber WAI lines indicate on
ECS/PRESS synoptic page?

Answer 11

Abnormal condition: wing temperature
< 100°F for several minutes after it’s
commanded to On or > 180°F

Question 12

In regards to FMS programming, what
must you do if you plan to takeoff
with WAI and CAI selected to On?

Answer 12

Remember to select Cowl+Wing in TSC
Perf Takeoff AC Cfg or V Speeds will
remain amber after parking brake release

Question 13

Where is CAI exhausted overboard?

Answer 13

Hot air travels through CAI supply duct to
heat lip skin and exhausts overboard
through vent located at bottom of engine

Question 14

What happens when CAI is selected
On?

Answer 14

CAI valve opens regardless of altitude or
ice detection.

Question 15

What kind of rain removal system
does the aircraft have?

Answer 15

There’s a surface coating on windshield
that deflects water

Question 16

What’s the caution associated with
removal of ice from windshield?

Answer 16

Use of mechanical means to remove ice
from windshield causes degradation and
should be avoided

Question 17

What happens when EVS Window
Heat is selected?

Answer 17

The switch blooms cyan, EVS window
graphic turns green and EVS window
heats for five (5) minutes. Otherwise,
operation is automatic if aircraft is
airborne and ice is detected.

Question 18

What happens when Cabin Window
Heat is selected on the ground?

Answer 18

The switch turns green and cabin windows
are heated for ten (10) minutes: they’re
heated automatically airborne.

Question 19

What happens when TAT Probe Heat
is selected on ground?

Answer 19

The switch turns green and TAT probes
are heated for one (1) minute; otherwise
not heated on ground < 100 kts