Ice and Rain Protection Flashcards
Automatic ice detection operates when
> 75 kts
What does the 2 Ice detectors measure
Liquid water content
TAT
When does Pack Ram Air Inlet heat
Automatically applied by signals from the Automatic Ice Detection System
What are the positions of the ANTI-ICE selectors
OFF - OFF
AUTO - operates based on the Ice detection system
ON - Manually on
Describe the Engine ANTI-ICE
Hot bleed air from the respective eng
supplied to eng core and inlet cowl
operates on grd or air, BUT the AUTO mode does not operate on the ground
How do you know Engine anti ice is on
EAI on EICAS N1 digital display
Describe the Wing ANTI-ICE
4 electrical thermal mats
on midwing leading edge slats
operates - grd >75 kts
- Air
max 25 deg in auto
(do not use ON when > 10 deg TAT)
How do you know Wing ANTI-ICE is on
WAI on EICAS N1 digital display
What does Primary Window Heat provide
Exterior anti-ice for the FWD windows only
interior anti-fogging for all windows
What does Back up Heat
Anti-fogging to FWD windows
When are the Probes heated
when either engine is running
TAT heat is inhibited on the ground
Is the ice detector heated
Yes
after eng start to ensure they are clear
When is the automatic ice detection inhibited
< 75 kts
When does CAC Inlet Anti-ice operate
in air OR
when TAT is = 10 deg
When does the Eng anti ice operate
TAT = 10 deg
ON for grd operations (conditions)
AUTO inflight
(on Grd = 3 deg N1 has to be min 40% for 5 sec
for every 60 sec)
What is Icing Idle
When Eng Anti icing is operating the EEC with increase the engine idle
What conditions will close the eng anti ice
Eng Start Bleed overtemp Bleed overpressure Eng Fire switch pulled bleed leak
How many wing matts in total
24
3 per each slat (4 slats per wing)
What happens if a thermal mat fails
system automatically de-powers the mat on the opposite slat to prevent asymmetrical wing icing
is there a limitation on the wipers
No airspeed limitation
do NOT operate on dry glass
When is the cold wx operations procedure for taxi ?
When both of the following exist, do an engine run-up to minimize ice build-up:
• OAT is 3°C or below and visible moisture (clouds, fog with visibility of one statute mile[1600 m] or less, rain, snow, sleet, ice crystals, and so on).
3 deg or lower
40 N1
5 sec
60 min
When in manual engine ant ice what is the temp lim
15 degrees
What does ICA on engine display mean?
Ice Crystal Anti ice > 30,000 ft
When do you have to use the sure wx app for hot tables
Active frost
No HOTDS
What is the representative surface for the 787
Representative surface extends from leading edge of slat to trailing edge of flap between the engine pylon and the evacuation walkway on the left wing
How do you request a HOT DR
COMM
Transactions
Other
HOT/XXX. ( airport identification YYZ)
What conditions do we see barrel icing?
+5 to -5 with reduced vis due to rain or drizzle or freezing rain or freezing drizzle
