Ice and Rain Protection

Question 1

How are the cowl anti ice valves operated?

Answer 1

Electrically controlled
Pneumatically operated
Spring loaded closed

Question 2

Is the engine anti ice system primarily for de icing or preventative anti icing?

Answer 2

Preventative. Once ice has built up, it can break off and be ingested

Question 3

What are the indications of a malfunction in the anti ice valve?

Answer 3

COWL VALVE OPEN light remains illuminated bright blue
And
Amber TAI message remains on the respective N1 indicator

Question 4

What does an amber COWL ANTI ICE light mean?

Answer 4

An over pressure has been sensed in the duct downstream of the valve.

This is NOT temperature related

Question 5

Is the Wing Anti ice a deicing or anti icing system?

Answer 5

De and Anti icing on the ground

Only Deicing in flight

Question 6

What components of the leading edge have anti ice?

Answer 6

Leading edge slats 2-7 only

Question 7

How are the valves operated?

Answer 7

Electrically

Question 8

What happens if wing anti ice is left on for takeoff?

Answer 8

Wing anti ice valves automatically close once takeoff thrust is set and comes back on after weight off wheels