Ice & Rain Protection

Question 1

What are the two types of protection used on the G650?

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 the ice detection system.

Answer 3

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

Question 4

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

Answer 4

Automatic activation of the anti-ice system is inhibited.

Question 5

When does the amber Ice Detected CAS message extinguish?

Answer 5

If ice accumulation is <0.02” for one minute, the amber Ice Detected CAS message extinguishes.

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 the left wing and one provides WAI for the right wing.

Question 8

Where is wing anti-ice exhausted overboard?

Answer 8

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

Question 9

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

Answer 9

The WAI operates regardless of altitude or ice detection.

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

Question 11

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

Answer 11

Normal temperature (100 to 180°F)

Question 12

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

Answer 12

Wing temperature is < 100°F after two minutes from the time it’s commanded to ON or > 180°F

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

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 stage air

Question 15

What happens to the 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

Question 16

Where is cowl anti-ice exhausted overboard?

Answer 16

Hot air travels through the cowl anti-ice supply duct to heat the lip skin and is exhausted overboard through an exhaust vent located at the bottom of the engine.

Question 17

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

Answer 17

The CAI valve solenoid is de-energized and the valve opens regardless of altitude or ice detection.

Question 18

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

Answer 18

The soft rubber tip distorts and provides passive ice shedding

Question 19

What kind of rain removal system does the G650 have?

Answer 19

There’s a surface coating on the windshield that deflects water

Question 20

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

Answer 20

Use of mechanical means to remove ice from the windshield will cause degradation and should be avoided

Question 21

What happens when the EVS WSHLD HT switch is selected?

Answer 21

The switchlight indicates blue ON and two (2) minutes of thermostatically controlled continuous heating is provided to the EVS windshield. Otherwise, operation is automatic if the 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 the landing gear.

Question 22

What happens when the CABIN WDO HT switch is selected to ON?

Answer 22

The 16 cabin windows are electrically heated with a single phase of low power alternating current (AC) when WOW is in the flight mode and the OFF caption is extinguished. When WOW is in the ground mode, the 16 cabin windows are not electrically heated and the OFF caption is illuminated unless this feature is overridden by activating the WDO HT GND BYP switch controlled through the MCDU SSPC menu.

Question 23

What safety feature does the WDO HT GND BYP switch in the SSPC incorporate?

Answer 23

It automatically reverts to OFF after 10 minutes to prevent overheating which could cause window damage and discoloration. It can be reset through the MCDU.

Question 24

Are TAT probes heated on the ground?

Answer 24

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