FAA Aircraft Dispatcher Practice Exam

Which component generally initiates the operation of de-ice systems?

1. Flight crew command

2. Automatic sensor control

3. Ground maintenance checks

4. Environmental conditions

The correct answer is: Automatic sensor control

The operation of de-ice systems is primarily initiated by automatic sensor control. This system is designed to detect when ice begins to form on the aircraft surfaces and automatically activates the de-icing mechanisms to prevent or remove ice accumulation. The utilization of automatic sensors is critical, as they provide immediate response capabilities based on actual environmental conditions rather than requiring manual input from the flight crew or maintenance personnel. In contrast, the other options do not serve as the primary initiators of de-ice systems. While the flight crew can command de-ice systems based on their observations or procedures, this is a reactive measure rather than an automated initiation. Ground maintenance checks are also essential but occur prior to flight and do not actively control de-ice systems during operation. Environmental conditions, while they influence the necessity of de-icing, do not directly control the initiation of system operation without the monitoring and control capabilities provided by automatic sensors.