What kind of ice protection does the ADG have?

• A. Internally electrically heated
• B. Bleed air heated
• C. Pneumatic de-icing boots
• D. Chemical anti-icing fluid

Answer: (A)

Ice protection for the ADG relies on heating the unit itself from within. The Air Driven Generator is an emergency power source that must operate even when other systems are down, so it needs to stay free of ice to spin up reliably. Electrical heating inside the unit uses the aircraft’s electrical power to keep the housing warm, making the protection self-contained and dependable without needing bleed air or external fluids. Bleed-air heating would require extra plumbing and a supply that might not be available in an emergency; pneumatic de-icing boots protect surfaces like wings, not a compact generator housing; chemical anti-icing fluids aren’t practical for a moving, enclosed device. So the best, simplest solution is internal electrical heating to prevent ice buildup.