Icing Flashcards
What is definition of in-flight icing conditions
TAT 7C or OAT 5C or less
Visible moisture
What is defined as visible moisture?
clouds, fog with visibility of less than one mile, rain, snow, sleet and ice crystals.
You are holding short about to depart. The OAT is 5C and there is visible moisture. What should you have turned on?
It’s icing conditions and you should turn on level 1 & 2
Also use icing speeds
You are holding short about to depart and the OAT is 5C on a clear, beautiful day. What should you have turned on?
Level 1 protections. It’s not icing conditions.
You are taxiing out and the taxiways are covered in slush. The OAT is 5C. What should you have turned on?
It is ground icing conditions, so:
Level 1s
Continuous relight
Prop anti ice
You are in clouds and the TAT is 7C. You start to pick up ice. What do you turn on?
You are in icing conditions so you should already have level 1 & 2s on. Turn on level 3
What is the definition of ground icing for takeoff?
OAT 5C or less and visible moisture
Where is the ice detector located?
Left wing
What ice protection do we have?
Boots: wings, tail, eng intake and air separator chambers
Heated: prop blades, windshield, probes, flight control horns
What does the ice detector do?
Alerts the crew as soon as and as long as ice accretion is sensed by the probe
When the ICING light goes out, are you clear of ice on the aircraft?
No, you must visually check
When does the amber ICING light illuminate?
When horns are on and ice accretion was sensed
ICING AOA green light illuminates when…
When horns PB is selected on
How do you extinguish the green ICING AOA light?
Horns off, PB push
When does blue DE ICING indicator light come on on the memo panel?
When airframe deice is on
