Ant-icing, De-icing And Rain Protection

Question 1

All critical surfaces must be clear of contamination. What are the critical surfaces being referred too?

Answer 1

Upper and lower wing surfaces, fin and horizontal stabiliser

Question 2

In reference to icing systems, what is bleed air?

Answer 2

Hot air tapped from engines/APU and fed under skin of panels (primarily leading edges)

Question 3

In reference to icing systems, what are electrical heating mats?

Answer 3

Fixed thermal mats on the outside of leading edges

Question 4

In reference to icing systems, what is fluid is used to decontaminate?

Answer 4

Glycol, sprayed from tiny holes on the leading edges

Question 5

In reference to icing systems, what are inflatable boots?

Answer 5

Black sections on leading edges which inflate/expand to break off ice.

Question 6

How does an electromechanical ice detector work?

Answer 6

Change in resonance indicates ice forming on the sensor

Question 7

How does a mechanical ice detector work?

Answer 7

Aneroid capsule has a tube which protrudes into the airflow, if the tube becomes book, the air pressure inside the aneroid capsule changes

Question 8

How does an electrical ice detector work?

Answer 8

Contamination causes a large voltage difference between the detector loop and a reference loop