Icing Questions Flashcards
What are the takeoff limitations for ice and snow on the leading edges, control surfaces, and upper Wing?
Free of ice and snow
What are the takeoff limitations for ice and snow on the lower Wing?
A light coating of frost, up to 3 mm (⅛”), on the underside of the wing fuel tank area
The shorter hold over time has been exceeded, but not the longer hold over time and precipitation is present. What action is required?
A pre-take-off contamination inspection. This is a visual inspection of the effectiveness of the anti-icing fluid on the critical surfaces from the cabin within five minutes before the takeoff roll. If frozen deposits start to form or accumulate on treated critical aircraft services, a further de-ice and application of anti-icing fluid is required
The longer hold overtime has been exceeded and precipitation is present. what action is required?
A pre-take-off contamination check is required within five minutes before the takeoff roll. If the pre-takeoff contamination check proves to be impractical, return for dicing slash anti-icing. If frozen deposits start to form or accumulate on treated critical aircraft services, a further de-ice and application of anti-icing fluid is required
Are snow, ice, or frost permitted on the fuselage?
Only thin hoarfrost is permitted on the upper surface of the fuselage provided all vents and ports are clear of Frost
On a METAR or forecast how other three intensity levels (light common moderate, heavy) of snow depicted?
SN indicates snow is falling at a moderate intensity. if any precipitation begins with a minus or a plus it’s either light or heavy
What hold over time is available if + SN conditions exist or are forecast for takeoff?
As directed by the CAUTION on each chart in Ops manual part A, NO holdover time guidelines exist for heavy snow, regardless of temperature or type of anti-icing fluid being applied
Where would you find the decodes for Japan’s domestic SNOWTAM
Ops A
After an overnight in freezing conditions, what unusual effects may be noticed during taxi and takeoff?
The tyres may retain flat spots and, with a short taxi distance, may not warm up sufficiently. Moderate nose wheel and airframe vibrations may occur on takeoff.
What precautions should be taken during taxi out or after landing through slush or standing water?
Taxi out with the flaps UP. Due to cold soak at altitude, aircraft temperatures may be lower than OAT. Do not retract the flaps after landing until a visual inspection has been accomplished full stop consider informing ATC as some States may misinterpret flap extended taxi in operation as a possible hijacking event
After a landing and taxi in dry snow conditions with an oat of minus 20 degrees C, is it necessary to use engine anti-ice?
Yes. Engine anti-ice must be used during all ground and flight operations when icing conditions exist or are anticipated
After a cold weather start with an OAT of minus 20 ℃, a generator fault light is illuminated. What may be the cause?
Cold oil in the CSD and the generator may be slow to produce steady power for stop usually one minute is enough to return to normal operation but up to five minutes may be required
Having decided to leave the flaps up during taxi out for slush and/or standing water conditions, what would you do differently concerning checklist management?
Wait for the flap to reach the takeoff configuration before calling for the before-takeoff checklist
JET A fuel freeze point is minus 40 ℃. what is the restrictive fuel freeze point?
- 37 ℃
What would you do when the fuel temperature approaches the restrictive fuel freeze point?
Decrease altitude, increase Mach number or divert to warmer air
