Ice and Rain Protection Flashcards
Icing conditions exist when the SAT on the ground and in flight is between _____°C and ___°C and visible moisture is present. (clouds, fog w/ visibility < 1 mile, rain, snow, etc)
+10°C , -40°C
The wing and cowl anti-ice systems must be ____ when entry into icing conditions is imminent.
selected ON.
Icing conditions exist when the SAT on the ground is ________ when operating where surface snow, ice, standing water, or slush may be ingested by the engines or freeze on engines, nacelles, or engine sensor probes
+10°C or below
A visual and tactile check of the wing and leading edge must be performed when the OAT is less than _____.
+6°C
A visual and tactile check of the wing must be performed if it cannot be ascertained that the wing fuel temp is above ____°C; AND…
0°C
- There is visible moisture; or
- Water is on the wing; or
- Temp - Dew Point spread is 5°F (3°C) or less; or
- There’s a good chance of frost or frost is present.
If required, The wing and cowl anti-ice must be selected ON at least _____ prior to setting takeoff thrust.
2 minutes
Automatic anti-ice is provided as a backup to the crew for activation of the systems. The feature is inhibited above ____. If anti-ice protection is needed above this altitude, it must _______.
35,000 ft
be turned on manually.
Use of flaps in icing conditions is restricted to______only.
Takeoff, approach, and landing.
Prior to extending flaps for apch or lndg, ensure wing anti-ice is activated and functional
Holding in icing conditions is limited to _____° flaps only.
0°
Minimum holding speed of ____Kts must be maintained when holding in icing conditions.
180 Kts
Operation of Wing anti-ice is required if (2 things)…
- Entry into icing is imminent.
2. Detection of ice on wings, winglets, windshield edges.
Use of cowl anti-ice is required for taxi and takeoff when SAT is _____, and ________.
+10° or below and visibile moisture or wet runway present.
When taxiing or holding on the ground at low power in temps less than ____, engine operations of ____%LP for ____ seconds is recommened just prior to takeoff and at intervals of not more than _____ minutes under those temperature and moisture conditions.
+1°C
40% LP
10 seconds
60 minutes
Engine vibrations may increase when icing occurs. The fan should normally shed the ice and vibration will return to normal. To help shed the ice when high vibration occurs and operational circumstances permit, one engine at a time may be quickly ____, held there for ____ seconds and then _____.
retarded to idle,
5 seconds,
accelerated to 90% LP before power returned to original position.
