Ice Protection/Detection

Question 1

What sources are used for aircraft anti-icing and de-icing?

Answer 1

Bleed air and electric heat

Question 2

What uses bleed air for ice protection?

Answer 2

Engine cowl and three outboard slats

Question 3

What uses electric heat for ice protection?

Answer 3

Pitot-static, windshield, water lines, pressurization static port

Question 4

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

Answer 4

Opposite wing through cross bleed, but not opposite engine

Question 5

How many ice detectors must be working to have icing detection?

Answer 5

One. Two for redundancy

Question 6

How long will the de-icing system remain on after icing is no longer detected?

Answer 6

Five minutes

Question 7

If ICING on the MCDU is set to OFF, and icing conditions are encountered on TO roll, will the de-icing system turn on?

Answer 7

Not until 1700ft or 2 minutes (whichever occurs first)

Question 8

Can the APU provide de-icing bleed air?

Answer 8

No

Question 9

What is protected from ice and rain?

Answer 9

Engine inlets
Wing leading edge
Smart probes
Windshields
Water and waste drain

Question 10

Is the ice protection system automatic?

Answer 10

Yes, under normal conditions

Question 11

Can the pilot override the automatic system?

Answer 11

Yes

Question 12

How is ice detected in flight?

Answer 12

2 ice detectors - vibrating, etc.

Question 13

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

Answer 13

10th stage

Question 14

How is bleed air directed for pneumatic anti-ice?

Answer 14

Engines: Independent
Wings: Onside bleed

Question 15

What happens if there is a single bleed source failure?

Answer 15

The crossbleed automatically opens

Question 16

How should the MCDU be set if there are icing conditions present on the ground?

Answer 16

ALL

Question 17

What does selecting ALL on the MCDU provide?

Answer 17

Engine a-ice: On when engines are running

Wing a-ice: On at 40kts wheel speed

Question 18

If ALL is selected on the ground, at what point will the anti-ice system become automatic?

Answer 18

1700 AGL or 5 minutes after takeoff (whichever first)

Question 19

If OFF is selected on the ground, at what point will the anti-ice system become automatic?

Answer 19

1700 AGL or 2 minutes after takeoff (whichever first)

Question 20

How does the failure of one of the two power sources affect the windshield heating system?

Answer 20

On ground inhibited

In flight: Left side is heated (right heats if left has failed)

Question 21

What does the TIMER selection on the windshield wiper do?

Answer 21

Activates the associated wiper at 8 second intervals

Question 22

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

Answer 22

The wiper will stop

To reset wiper move switch to OFF

Question 23

When do the smart probes heat?

Answer 23

When an engine is running, or ADS probes button is pushed in

Question 24

Is there a test for the anti-ice system?

Answer 24

Yes, but mx performs the test

Question 25

How should the aircraft be configured for de-icing?

Answer 25

Bleeds - OFF
Stab trim - Full nose down
Flaps - UP
Engines or APU - On or Off

Question 26

If an overheat or leak is detected on the wing system, with the other side continue to provide anti-ice protection?

Answer 26

No. If one side fails the other will deactivate to avoid asymmetric protection

Question 27

Mesa ice protection rules

Answer 27

Ground: OAT 5 C to 10 C and possibility of encountering ice up to 1700 AGL - ENG on
Contaminated surface where snow/slush/ice could be ingested - ENG on
40kts)

No single engine taxi in icing