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Icing conditions exist when the air contains droplets of supercooled water. They freeze on contact with a potential nucleation site, which in this case is the parts of the aircraft, causing icing. Icing conditions are characterized quantitatively by the average droplet size, the liquid water content and the air temperature.
An AIRMET, or Airmen's Meteorological Information, is a concise description of weather phenomena that are occurring or may occur (forecast) along an air route that may affect aircraft safety. Compared to SIGMETs , AIRMETs cover less severe weather: moderate turbulence and icing, sustained surface winds of 30 knots or more, or widespread ...
The aircraft took off at 11:09 EST (16:09 UTC) with eight passengers and two pilots on board. At that time, visibility was approximately 0.5 statue miles with moderate snow showers. Despite not de-icing the aircraft, Roch had started the propeller de-icing unit, the stall warning system, pitot heating, and the windshield heat panel.
National Transportation Safety Board Jennifer Homendy said Sunday that the plane was flying in an area where moderate icing was possible between 2,000 feet (610 meters) and 8,000 feet (2,438 meters) and where the weather could be hazardous to light aircraft.
The document pointed out that icing detectors had been activated on airline Voepass’ aircraft, and a Cenipa official told a press conference that cockpit recordings showed the copilot said there ...
Rime ice also forms when ice forms on the surface of an aircraft, particularly on the leading edges and control surfaces when it flies through a cloud made of supercooled water liquid droplets. Rime ice is the least dense, milky ice is intermediately dense and clear ice is the most dense. All forms of ice can spoil lift and may have a ...
Aircraft icing increases weight and drag, decreases lift, and can decrease thrust. Ice reduces engine power by blocking air intakes. When ice builds up by freezing upon impact or freezing as runoff, it changes the aerodynamics of the surface by modifying the shape and the smoothness of the surface which increases drag, and decreases wing lift ...
The aircraft was 10 nmi (19 km) east (090 degrees radial) of the London VOR at 2120 UTC. The aircraft was at 3,000 ft (910 m) and was a Cessna 172. The pilot reported moderate turbulence. The remarks says that the turbulence was below 5,000 ft (1,500 m) between Kitchener/Waterloo and London.