This leaflet focusses on piston engine icing. Induction system icing in piston engines is commonly referred to as ‘carburettor icing’. Although that is only one form, such icing can occur at any time, even on warm days, particularly humid ones… If correct action is not taken, the engine may stop, especially at low power settings during approach. This leaflet is intended to assist pilots of carburetted piston engined aircraft operating below 10 000 feet by providing background information and a few practical tips.