Ice and Rain Protection Flashcards
What are the two types of protection against ice accumulation?
Electric and pneumatic
Where is ice buildup prevented?
W-Wing leading edges
W-Windshield
E-Engine cowl inlets/bullet
A-Aft drain mast/ forward drain mast
P-Probe sensors
Describe ice detection system.
It’s comprised of two independent systems
consisting of two ice detectors: one
mounted below pilot window and one
below copilot window.
When does cyan Ice Detected CAS
message extinguish?
Ice accumulation < 0.02” for three (3)
minutes
With switches in auto, when does
cowl and wing heat cease?
Approximately two (2) minutes after Ice
Detected message extinguishes; it varies.
Ref: Flight test verification / sim
certification
Describe WAI system?
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.
Where is WAI exhausted overboard?
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
What happens when WAI is selected
to On?
WAI operates regardless of altitude or ice
detection.
What do blue wing anti-ice lines
indicate on ECS/PRESS synoptic
page?
WAI temperature ≤ 100°F
What do green wing anti-ice lines
indicate on ECS/PRESS synoptic
page?
Normal temperature (100 to 180°F)
What do amber WAI lines indicate on
ECS/PRESS synoptic page?
Abnormal condition: wing temperature
< 100°F for several minutes after it’s
commanded to On or > 180°F
In regards to FMS programming, what
must you do if you plan to takeoff
with WAI and CAI selected to On?
Remember to select Cowl+Wing in TSC
Perf Takeoff AC Cfg or V Speeds will
remain amber after parking brake release
Where is CAI exhausted overboard?
Hot air travels through CAI supply duct to
heat lip skin and exhausts overboard
through vent located at bottom of engine
What happens when CAI is selected
On?
CAI valve opens regardless of altitude or
ice detection.
What kind of rain removal system
does the aircraft have?
There’s a surface coating on windshield
that deflects water
What’s the caution associated with
removal of ice from windshield?
Use of mechanical means to remove ice
from windshield causes degradation and
should be avoided
What happens when EVS Window
Heat is selected?
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.
What happens when Cabin Window
Heat is selected on the ground?
The switch turns green and cabin windows
are heated for ten (10) minutes: they’re
heated automatically airborne.
What happens when TAT Probe Heat
is selected on ground?
The switch turns green and TAT probes
are heated for one (1) minute; otherwise
not heated on ground < 100 kts
