Ice and Rain Protection Flashcards
Why is it recommended to remove all pitot and AOA covers prior to starting the APU or connecting external power?
All heaters are tested ON when AC power is applied to the aircraft
When is cowl anti-ice required on the ground?
OAT is +10ºC and below, with visible moisture in any form OR OAT +10ºC and viz
At what airspeeds are the ice detectors considered ineffective?
Less than 30kias
During takeoff, can the cowl/wing anti ice be in AUTO?
No, Anti ice AUTO mode prohibited
When would wing anti ice be selected on just prior to thrust increase for takeoff?
When type II, III or IV fluids have been applied
When is wing anti ice required in flight?
During icing conditions or when ICE is annunciated on the EICAS
Minimum engine speed while in icing conditions?
76% N2
When switches on the ANTI-ICE panel are set to AUTO, when will the cowl/wing anti-ice systems activate?
When ice detector(s) detect ice
What systems are provided with full automatic electrical ice protection?
Air data probes and sensors
When is wing anti ice required on the ground?
OAT is +5ºC and below, with visible moisture in any form (viz
When is cowl anti ice required in flight?
During icing conditions or when ICE is annunciated on the EICAS
Why are the cowl anti ice valves spring loaded open and closed pneumatically?
In the event of electrical power failure, the valves remain operable(fail safe open)
What is the purpose of the wing crossbleed valve(CBW)
Allows both wings to be anti ice from a single engine source
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?
Approximately 2 minutes
What is the AFM operating limitation while holding in icing conditions?
Do not hold in icing conditions with the slats extended
