Higher humidity levels coupled with abnormal temperature variations when flying in certain locations and height, can cause the carburettor temperature to drop and ultimately freeze.As the ultimate fail-safe, the pilot(s) must be able to detect temperature drop of the carburettor and this is achieved via the Carburettor Temperature Probe (CRB) connected to the Aircraft Engine Monitoring Systems. When temperature drops, pre-heat can be switched on to prevent the freezing of the carburettor.
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