Ice And Rain Protection Flashcards
What systems have ice protection?
Wings/stab
Air intake
Probes (2 pitot, 2 AOA, 2 static)
Windshields
Propeller
Approved for flight into what kind of icing?
Light to moderate
Type of air used for anti ice?
P3 stage reduced to 14 psi
Boot heat sequence
Stab, inboard lower then upper, outboard lower then upper
Max number of boot patches?
No
Operating range?
-40 C to + 40 C
What signals that anti ice is in use?
5 pressure switches rated at 11 psi
What could cause a de ice failure CAWS message?
Low power settings at high pressure altitudes
What determines the heat the prop gets?
OAT sensors and timer
What ensures the boots remain deflated when not in use?
Generated vacuum pressure
Can the engine lip heating be turned off?
No. Always on
Inertial separator must be open for…
•Takeoffs and landings on runways cov-
ered with snow, ice, or standing water
• Flight in heavy precipitation
•Takeoffs and landings in dusty or pos-
sible FOD conditionsPILATUS
Inertial separator message on CAWS when….
Door not fully open
How does the inertial separator door affect performance?
It decreases
Is it normal for the inertial separator screen to be iced over?
Yes
What happens with the separator door open and prop heat on?
Pusher ice mode…reduces critical AOA by 8 degrees
What causes the EIS OAT gauge to flash?
Temp less than 4 degrees and probe heat not on
Is there over temp protection for windshield heating?
Yes, beyond 60 C
What does the light selection on windshield heat provide? Heavy?
Light…to whole windshield
Heavy…just to the center
Where are the oat sensors? Which is the primary
Wing, by AOA sensor. LH is primary
Do all 4 props heat at the same time?
No, only two at a time to prevent asymmetry
How does anti ice affect Vr?
Rotate at +9 kts
How can anti ice affect accelerate stop distance?
Increase by 27%
How can anti ice affect takeoff ground roll?
Increase by 30% and total takeoff distance by 32%
How can anti ice affect holding performance?
Fuel flow can increase by 25% to 50%
How can de ice affect balked landing?
Decrease VS by 100 fpm or 500 fpm for boot failure
Landing performance before boot failure
Ground roll can increase by 90% and total landing distance by 55% with no reverse
Landing performance after boot failure
Ground roll can increase by 160% and total landing distance by 90%
WHat is the flap extension limit in icing conditions?
15 degrees
