Anti-Ice System: Taxi with contamination/visible moisture OAT 10°C or below uses which component?

• A. Wing anti-ice system
• B. Tail anti-ice system
• C. Cowls anti-ice system
• D. Pylon anti-ice system

Answer: (C)

When taxiing with contamination or visible moisture and the outside air temperature is 10°C or below, ice can start forming on the engine inlet. The engine cowls anti-ice system uses hot bleed air to warm the engine cowl and inlet area, keeping it above freezing so ice doesn’t build up and risk compressor damage or flameout. Wing anti-ice is used to prevent icing on the wings during flight, not typically during ground taxi; tail and pylon anti-ice address other surfaces and aren’t the setting for this ground condition. So the component used in this scenario is the engine cowls anti-ice system.