3. Anti-ice, Rain

Question 1

Wing anti-ice

Answer 1

Only extends across the middle slats.

Question 2

Ice probe detects then heats to shed ice.

Answer 2

Engine ice goes on at start of this cycle. Wing only after several repeated cycles.

Question 3

WAI - ON

Answer 3

Only in flight.

AUTO is normal position

Question 4

WAI is inhibited

Answer 4

• On Ground; and
• 5min after TO if >= 10C;
AUTO inhibited:
• 10 min after TO

Question 5

EAI supplied by

Answer 5

It’s own engine bleed. Cannot get from other engine.

Question 6

WAI

Answer 6

Can be supplied by opposite bleed

Question 7

WINDOW HEAT

Answer 7

• All heated;
• Front two: Anti-iced;
• Other: Defogged

Question 8

ENG ICE LEAK

Answer 8

Causes auto closing of valve. Results in ENG ICE LOSS. When cooled, valve tries to reopen.

Question 9

ANTI-ICE ENG L

Answer 9

Valve commanded open but remains closed

Question 10

ANTI-ICE ENG L

Answer 10

If it operates open and closed manually, may be AUTO failure. Operate manually.

Question 11

ANTI-ICE WING

Answer 11

Valve not in commanded posn. Other side valve closes to avoid asymmetric icing.