8.) When do “Icing conditions” exist in the air?
When the OAT, on ground and for TO, or TAT in flight, is 10 deg.C or below and visible moisture is present, (i.e. clouds, fog with vis. 1 mile or less, rain, snow, sleet, and ice crystals. (RISS), or temperature and dew point are within 3°C (5°F) (AOM, L-2, S-12.1)