With a gas turbine engine, engine anti-icing should be selected ‘ON’:
a. Whenever the igniters are on
b. Whenever the IOAT is +10°C or below and the air contains visible moisture c. Whenever the TOAT is +10°C or below and it is raining
d. Whenever the ice detector system warning light comes on
a. Whenever the igniters are on
b. Whenever the IOAT is +10°C or below and the air contains visible moisture c. Whenever the TOAT is +10°C or below and it is raining
d. Whenever the ice detector system warning light comes on