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Flashcards in Ice and Rain Protection Deck (17)
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1
Q

Why is it recommended to remove all pitot and AOA covers prior to starting the APU or connecting external power?

A

All heaters are tested ON when AC power is applied to the aircraft

2
Q

When is cowl anti-ice required on the ground?

A

OAT is +10ºC and below, with visible moisture in any form OR OAT +10ºC and viz

3
Q

At what airspeeds are the ice detectors considered ineffective?

A

Less than 30kias

4
Q

During takeoff, can the cowl/wing anti ice be in AUTO?

A

No, Anti ice AUTO mode prohibited

5
Q

When would wing anti ice be selected on just prior to thrust increase for takeoff?

A

When type II, III or IV fluids have been applied

6
Q

When is wing anti ice required in flight?

A

During icing conditions or when ICE is annunciated on the EICAS

7
Q

Minimum engine speed while in icing conditions?

A

76% N2

8
Q

When switches on the ANTI-ICE panel are set to AUTO, when will the cowl/wing anti-ice systems activate?

A

When ice detector(s) detect ice

9
Q

What systems are provided with full automatic electrical ice protection?

A

Air data probes and sensors

10
Q

When is wing anti ice required on the ground?

A

OAT is +5ºC and below, with visible moisture in any form (viz

11
Q

When is cowl anti ice required in flight?

A

During icing conditions or when ICE is annunciated on the EICAS

12
Q

Why are the cowl anti ice valves spring loaded open and closed pneumatically?

A

In the event of electrical power failure, the valves remain operable(fail safe open)

13
Q

What is the purpose of the wing crossbleed valve(CBW)

A

Allows both wings to be anti ice from a single engine source

14
Q

When wing anti ice system is selected on, how long does it take before the leading edges display in green on the BLEED/ANTI-ICE synoptic page?

A

Approximately 2 minutes

15
Q

What is the AFM operating limitation while holding in icing conditions?

A

Do not hold in icing conditions with the slats extended

16
Q

Based on icing conditions which selector positions on the ANTI-ICE panel are permitted for takeoff?

A

Based on icing conditions, either ON or OFF

17
Q

Which engine bleed is used for cowl anti-ice?

A

Low pressure bleed air only, 5th stage