What term refers to any instrument, mechanism, equipment, part, apparatus, appurtenance, or accessory, including communications equipment, that is used or intended to be used in operating or controlling an aircraft in flight, is installed in or attached to the aircraft, and is not part of an airframe, engine, or propeller?

What term refers to any instrument, mechanism, equipment, part, apparatus, appurtenance, or accessory, including communications equipment, that is used or intended to be used in operating or controlling an aircraft in flight, is installed in or attached to the aircraft, and is not part of an airframe, engine, or propeller?

• A. Air Traffic
• B. Air Transportation
• C. Appliance
• D. Alert Area

Answer: (C)

The term described is appliance. In aviation terminology, an appliance is any instrument, mechanism, equipment, part, apparatus, appurtenance, or accessory—such as communications gear—that is installed in or attached to the aircraft and is used or intended to be used in operating or controlling the aircraft in flight, yet is not part of the airframe, engine, or propeller. That specific scope matches the definition of an aircraft appliance. The other choices don’t fit this idea: Air Traffic refers to the control system for guiding aircraft, Air Transportation is the business of carrying people or cargo by air, and an Alert Area is a type of designated airspace. None of these describe equipment installed on the aircraft for operation or control.

The term described is appliance. In aviation terminology, an appliance is any instrument, mechanism, equipment, part, apparatus, appurtenance, or accessory—such as communications gear—that is installed in or attached to the aircraft and is used or intended to be used in operating or controlling the aircraft in flight, yet is not part of the airframe, engine, or propeller. That specific scope matches the definition of an aircraft appliance.

The other choices don’t fit this idea: Air Traffic refers to the control system for guiding aircraft, Air Transportation is the business of carrying people or cargo by air, and an Alert Area is a type of designated airspace. None of these describe equipment installed on the aircraft for operation or control.