Ice And Rain

Question 1

What are the two types of protection
used on G650?

Answer 1

Electric and pneumatic
Ref: AOM 2A

Question 2

Where is ice buildup prevented?

Answer 2

Wing leading edges 
Engine cowl inlets 
Windshields 
Probe sensors 
Aft drain mast 
Ref: AOM 2A

Question 3

Describe the 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.
Ref: AOM 2A

Question 4

If Anti-ice switches are set to AUTO,
anti-ice operates automatically for
altitudes ≤ 35,000 feet. What happens
for altitudes > 35,000 feet?

Answer 4

Automatic activation of anti-ice system is inhibited.
Ref: AOM 2A

Question 5

When does the amber Ice Detected
CAS message extinguish?

Answer 5

If ice accumulation is < 0.02” for one minute, amber
Ice Detected CAS message extinguishes.
Ref: AOM 2A

Question 6

What continues to receive heat after
the amber Ice Detected CAS message
extinguishes?

Answer 6

Cowl heat continues for three (3) minutes and wing
heat continues for five (5) minutes

Question 7

Describe the wing anti-ice (WAI)
system?

Answer 7

It consists of two independent control systems,
pneumatically linked via the crossover duct. One
system provides WAI for left wing and one provides
WAI for right wing.
Ref: AOM 2A

Question 8

Where is wing anti-ice exhausted
overboard?

Answer 8

Hot air flows through leading edges of each wing,
passes through main wheel well, and through two
screens aft of wheel well on bottom of aircraft
Ref: AOM 2A

Question 9

What happens when wing anti-ice is
selected to ON?

Answer 9

WAI operates regardless of altitude or ice detection.
Ref: AOM 2A

Question 10

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

Answer 10

Wing anti-ice temperature ≤ 100°F within two (2)
minutes

Ref: AOM 2A

Question 11

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

Answer 11

Normal temperature (100 to 180°F)
Ref: AOM 2A

Question 12

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

Answer 12

Wing temperature < 100°F after two minutes from the
time it’s commanded to ON or > 180°F
Ref: AOM 2A

Question 13

In regards to FMS programming,
what must you do if you plan to
takeoff with WAI and/or cowl anti-
ice (CAI) selected to ON?

Answer 13

Remember to make appropriate selection during
TAKEOFF INIT or your speeds won’t box
Ref: AOM 2B

Question 14

What happens to cowl anti-ice if both
ENG BLEED AIR switches are
selected to OFF?

Answer 14

Nothing: cowl anti-ice uses 5th
Ref: AOM 2A

Question 15

What happens to cowl anti-ice valve
with loss of electrical power or loss
of 8th stage air to hold it closed?

Answer 15

It spring loads open
Ref: AOM 2A

Question 16

Where is cowl anti-ice exhausted
overboard?

Answer 16

Hot air travels through cowl anti-ice supply duct to
heat lip skin and exhausts overboard through exhaust
vent located at bottom of engine.
Ref: AOM 2A

Question 17

What happens when cowl anti-ice is
selected to ON?

Answer 17

CAI valve solenoid is de-energized and the valve
opens regardless of altitude or ice detection.
Ref: AOM 2A

Question 18

What happens to the spinner if ice
accumulates during engine
operation?

Answer 18

Soft rubber tip distorts and provides passive ice
shedding

Ref: AOM 2A

Question 19

What kind of rain removal system
does G650 have?

Answer 19

There’s a surface coating on windshield that deflects
water
Ref: AOM 2A

Question 20

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

Answer 20

Use of mechanical means to remove ice from
windshield causes degradation and should be avoided
Ref: AOM 2A

Question 21

What happens when EVS WSHLD
HT switch is selected?

Answer 21

Switchlight indicates blue ON and two (2) minutes of
thermostatically controlled continuous heating is
provided to EVS windshield. Otherwise, operation is
automatic if aircraft is airborne and cowl anti-ice is
ON (either from manual selection or automatic
selection with ice detection). The type of heat applied
is dependent on position of landing gear.
Ref: AOM 2A

Question 22

Are TAT probes heated on ground?

Answer 22

No; except for ≥ 60 kts or both throttles
≥ 30°.