Ice and Rain Protection

Question 1

The aircraft’s electrical system is used to heat (5):

Answer 1

Flight deck windshields, Air Data Smart Probes, TAT probes, water lines, static port

Question 2

What uses bleed air for ice protection?

Answer 2

Engine cowls, three outboard slats

Question 3

What part of the engine is heated?

Answer 3

Only the engine cowls are anti-iced.

Question 4

What control surfaces are heated by the wing anti ice system?

Answer 4

3 outboard slats

Question 5

Can the APU be used to provide bleed air for the anti-ice system?

Answer 5

No.

Question 6

What happens if there is a single bleed source failure?

Answer 6

The crossbleed automatically opens and uses opposite bleed for both wings.

Question 7

When in flight with a single AC source available, the ________ windshield will be heated.

Answer 7

Only the left.

Question 8

In flight with a single AC source available, the ___________ windshield will be heated if the left fails.

Answer 8

Right.

Question 9

Sources for aircraft anti-icing are:

Answer 9

Bleed air and electric

Question 10

Which panels on the wing do not have ice protection?

Answer 10

Inboard slats, flaps and spoilers

Question 11

What uses electrical power to prevent icing?

Answer 11

ADSPs, TAT probes, windshield, static port, water lines

Question 12

What is heated at engine start?

Answer 12

ADS probes, TAT probes, water lines and static port

Question 13

If an engine fails, does the opposite wing receive ice protection?

Answer 13

Yes, the crossbleed valve opens and uses opposite bleed for both wings.

Question 14

If an engine fails, does the respective engine receive icing protection?

Answer 14

No, the failed engine does not receive heat to the engine cowl.

Question 15

How long will the engine and wing anti-ice system remain on after icing is no longer detected?

Answer 15

2 or 5 minutes (epic load dependent).

Question 16

Is the ice protection system automatic?

Answer 16

Yes, under normal conditions.

Question 17

Can the pilot override the automatic ice protection system?

Answer 17

Yes, by selecting the ICE PROTECTION selector knob to ON.

Question 18

How many ice detectors does the aircraft have?

Answer 18

2

Question 19

If any ice accumulation is detected or suspected, and the ice detection system is not activating, what should the pilot do?

Answer 19

Manually activate the system by selecting the ice protection mode selector knob to ON.

Question 20

How can a pilot tell if the aircraft is picking up ice in flight?

Answer 20

Look at the wipers and around the windshield.

Question 21

What happens to the engine anti-ice valve with the loss of electrical power?

Answer 21

The engine anti-ice valve is fail-safe open.

Question 22

Where do we set engine anti-ice for takeoff?

Answer 22

MCDU T/O DATASET menu

Question 23

For takeoff, anti-ice on the MCDU T/O DATASET is set to OFF, and the mode selector knob is set to AUTO. Will the anti-ice system turn on if icing conditions are encountered on the takeoff roll?

Answer 23

Not until 1700 AFE or 2 minutes after takeoff, whichever comes first.

Question 24

What does selecting ALL on the T/O DATASET menu provide for the engine, and how long does the protection last if no ice is detected with the ice mode selector knob set to AUTO?

Answer 24

Engine cowl is heated when the engine is running and turns off at 1700 feet AFE or 2 minutes after takeoff, whichever comes first.

Question 25

What does selecting ALL on the T/O DATASET menu provide for the wings, and how long does the protection last if no ice is detected with the ice mode selector knob set to AUTO?

Answer 25

Three outboard slats are heated at a wheelspeed of 40 knots, and turns off at 1700 feet AFE or 2 minutes after takeoff, whichever comes first.

Question 26

With the Ice Detection mode selector knob set to AUTO and the T/O DATASET REF A/I set to OFF, the wing and engine anti-ice is inhibited until when?

Answer 26

Until 1700 feet AFE or 2 minutes after takeoff, whichever comes first.

Question 27

When would the pilot select ALL on the MCDU DATASET REF A/I MENU?

Answer 27

On the ground during taxi and takeoff when SAT is below 10°C or below and icing conditions exist or are anticipated to be encountered below 1700 AFE.

Question 28

When would the pilot select ENG on the MCDU DATASET REF A/I MENU?

Answer 28

Never.

Question 29

When would the pilot select OFF on the MCDU DATASET REF A/I MENU?

Answer 29

No icing conditions present.

Question 30

When are wings heated on the ground?

Answer 30

If the MCDU DATASET REF A/I MENU is set to ALL and the wheelspeed is greater than 40 knots.

Question 31

With ice detection mode selector knob set to ON, when will the engine anti-ice operate?

Answer 31

Whenever the respective engine is running.

Question 32

In icing conditions, what is the correct configuration for anti-icing when taxiing after landing?

Answer 32

ICE PROTECTION MODE knob set to ON.

Question 33

What is the maximum airspeed if the windshield wipers fail unparked?

Answer 33

VMO/MMO

Question 34

What happens if the windshield wiper is operated on a dry windshield?

Answer 34

a. The windshield wipers will not operate on a dry windshield. b. Wiper will remain inoperative until the selector is set to OFF then one of the three available speeds.

Question 35

Is there a test for the anti-ice system?

Answer 35

Yes, but mx performs the test.

Question 36

When do we use the ice protection test selector knob?

Answer 36

TEST Function is a maintenance procedure.

Question 37

Passing through 10,000 feet after takeoff, you see the EICAS A-I WIND VLV OPEN; why?

Answer 37

The wing anti-ice system is testing itself.

Question 38

Icing conditions exist when SAT on the ground or takeoff or TAT in flight is:

Answer 38

10°C or below with: Visible moisture present in any form OR When operating on contaminated surfaces.

Question 39

During taxi put and takeoff, the MCDU T/O DATASET MENU must be set to _______ when SAT is 10°C or below and icing conditions exist or are anticipated to exist below 1700 AFE.

Answer 39

ALL

Question 40

The maximum speed for windshield wiper operations is?

Answer 40

250 knots.

Question 41

What compressor stage is bleed air tapped for anti-icing operations?

Answer 41

10th stage

Question 42

What indication would you get if the ADS probes were frozen on the ground?

Answer 42

Undesired airspeed indication on the ground | EICAS fault messages

Question 43

How do you clear the ADSPs if they are frozen in the ground?

Answer 43

Run an engine for 10 minutes OR Turn ON the ADSP heater for 10 minutes Verify no airspeed indication or EICAS messages remain