Plain English Meaning

Equipment on the aircraft that either stops ice from forming or breaks it off once it has. Anti-ice is preventive and runs before ice appears. Deice is corrective and is used after ice has built up.

Full Definition

Aircraft equipment designed to manage structural ice. Anti-ice systems are turned on before ice forms and prevent it from accumulating on protected surfaces. Deice systems are activated after ice has already formed and remove it from the protected surfaces. Common methods include pneumatic boots, heated surfaces (electrical or bleed air), weeping-wing fluid systems, and heated pitot tubes and windshields.

Context Anchor

Seen in instrument flying, discussions, aircraft equipment descriptions, and for - .