Ice And Rain Protection Flashcards
The wing cross bleed valve fails?
In last known position
The wing anti-ice system is automatically controlled by
The AILC
anti-ice and leak detection controller
Wing anti-ice Valves fail?
Closed
T2 probe provides?
Temperature data to theFADEC
FADEC uses T2 info to?
Set engine power and control the VG vanes
T2 heater function testing?
After right engine shutdown
Electrical power maintained on aircraft for at least one minute
During icing conditions The ice detectors are electrically deiced??
For 5 seconds every 60 seconds
What stage bleed air is used for wing anti-ice
10th stage engine bleed air
How is hot bleed air supplied to the wing?
Through ducting and released through piccolo tubes
Cowl anti ice valves?
? Controlled
? Operated
Electrically controlled
Pneumatically operated
Failsafe open
How many air data sensing heater controllers?
3
On the ground are the probes heated?
On ground
Either Gen operative
Probe switches off
L/R/stby pitots heated half power
__________________________________
Probes on? All powered excpt TAT
(Static ports,base heaters,AOA , pitots)
Probes switches in flight?
Full power regardless of switch position
Which side is the TAT probe on?
Right side
Windshield switches on high?
Windshields on high
Side windows low
When both wiper switches are in use which switch selection will determine the speed of both wipers?
The last switch selection
12-23 ch 12 Ice and rain protection
Cowls fail?
Open
How many probes need to detect icing to send an icing signal?
Just one probe
L/R PRSOV FAIL??
Closed
Wing anti-ice valves on the synoptics page show________valve position
Actual
They show the actual valve position
Wing anti-ice valves fail?
Closed
Wing overheat signal is generated by?
DCU
Cowl anti-ice valves fail?
Open
What monitors heating for air data probes and sensors?
3 ADSHC
Air data sensor heater controllers
On the ground which air data probes and sensors are not heated?
L/R pitot probe base
TAT
Windshield wiper limitation?
250 knts
How many ice detector signals are needed to generate the ice caution message?
1
How do the ice detectors detect ice?
The high frequency vibration decreases as ice is accumulated
How many channels does the AILC have?
2
Channel A and B
One actively managers while the other maintains a standby roll
Switched on a daily basis
Is there an EICAS ind of active AILC CHANNEL?
No
The wing anti-ice valves are spring loaded to what position?
Spring loaded to the closed position
The wing anti-ice valves will close when?
Bleed air pressure is removed
Loss of electrical power at the valve
Anti-ice duct failure detected by AILC
APU Is manually selected as the bleed source
What happens to the wing anti-ice valves if APU is manually selected as the bleed source?
The valves will close if selected on
The wing anti-icing ducts are also referred to as?
Piccolo tubes
The wing cross bleed valve is an _________ operated valve
The wing cross bleed valve is on Electrically operated valve
The white arcs for wing anti-ice on the N 2 gages indicate
Switch position
Cowl valves are fail safe______?
Cowl valves are fail safe OPEN
Cowl anti icing valves require 2 things to close
Air pressure
Electrical power
How many heaters in the pitot static probe?
2
One in the bass and one in the head
When does the pitot heater operate at full?
In flight only!!
1/2 pwr in grnd
When does the pitot base heater operate?
In flight ONLY
Standby pitot probe heated?
On gnd?
In flight??
Half power on the ground
Full power and flight
Statics ports?
Heated to full power when energized
AOA VANES?
Heated to full power when energized
TAT operates when?
Only in flight at full heat
What mode is used for the De misting and De fogging of the windshield and side window?
LOW MODE
When both wiper switches are in Use ? which switch selection will determine the speed of both wipers?
The last switch selection
12-23 ch23 Ice and rain protection6/11/20
Maximum airspeed with wipers?
250kias
?What heats the T2 probe
Pneumatics from the engine bleed air source
Whindshield heat off when?
30 degrees
The white arc on the n2 gauge
Goes from 0 to ?
0-77%n2
Where is the TAT probe?
Right side of aircraft
Which operate on a two temperature schedule? Windshields or side windows?
Windshields
Are the side windows operated on a one temperature schedule only?
Yes
The wing xbleed valve is ______contrld?
Electrically controlled
The range of the white arc
When wing anti-ice selected on
0 to 77%
Where are the Cowl anti-ice valves located?
In the aft equipment be
How many ice detector signals are needed to detect a ice caution?
One
The wing Anti ice valves are spring loaded to what position?
Spring loaded closed
The wing anti-icing ducts are also referred to as?
Piccolo tubes
The pitot head heater when energized operates?
Half heat on the ground
Full heat in flight
Pitot bases and TAT probe are not heated on the ground ever!! …..
…..
The side windows operate on one temperature schedule?
Yes!
