Browse everything in the library, or type a section number, ACS code or plain-language question.
84 ms- §1.1REGULATION — OFFICIAL DEFINITION
Air transportation
Air transportation means interstate, overseas, or foreign air transportation or the transportation of mail by aircraft.
- §1.1REGULATION — OFFICIAL DEFINITION
Aircraft
Aircraft means a device that is used or intended to be used for flight in the air.
- §1.1REGULATION — OFFICIAL DEFINITION
Aircraft engine
Aircraft engine means an engine that is used or intended to be used for propelling aircraft. It includes turbosuperchargers, appurtenances, and accessories necessary for its functioning, but does not include propellers.
- §1.1REGULATION — OFFICIAL DEFINITION
Airframe
Airframe means the fuselage, booms, nacelles, cowlings, fairings, airfoil surfaces (including rotors but excluding propellers and rotating airfoils of engines), and landing gear of an aircraft and their accessories and controls.
- §1.1REGULATION — OFFICIAL DEFINITION
Airplane
Airplane means an engine-driven fixed-wing aircraft heavier than air, that is supported in flight by the dynamic reaction of the air against its wings.
- §1.1REGULATION — OFFICIAL DEFINITION
Airport
Airport means an area of land or water that is used or intended to be used for the landing and takeoff of aircraft, and includes its buildings and facilities, if any.
- §1.1REGULATION — OFFICIAL DEFINITION
Airship
Airship means an engine-driven lighter-than-air aircraft that can be steered.
- §1.1REGULATION — OFFICIAL DEFINITION
Alert Area
Alert Area An alert area is established to inform pilots of a specific area wherein a high volume of pilot training or an unusual type of aeronautical activity is conducted.
- §1.1REGULATION — OFFICIAL DEFINITION
Alternate airport
Alternate airport means an airport at which an aircraft may land if a landing at the intended airport becomes inadvisable.
- §1.1REGULATION — OFFICIAL DEFINITION
Altitude engine
Altitude engine means a reciprocating aircraft engine having a rated takeoff power that is producible from sea level to an established higher altitude.
- §1.1REGULATION — OFFICIAL DEFINITION
Amateur rocket
Amateur rocket means an unmanned rocket that:
- §1.1REGULATION — OFFICIAL DEFINITION
Appliance
Appliance means 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
- §1.1REGULATION — OFFICIAL DEFINITION
Approved
Approved , unless used with reference to another person, means approved by the FAA or any person to whom the FAA has delegated its authority in the matter concerned, or approved under the provisions of a bilateral agreement between the Unit
- §1.1REGULATION — OFFICIAL DEFINITION
Area navigation (RNAV)
Area navigation (RNAV) is a method of navigation that permits aircraft operations on any desired flight path.
- §1.1REGULATION — OFFICIAL DEFINITION
Area navigation (RNAV) route
Area navigation (RNAV) route is an ATS route based on RNAV that can be used by suitably equipped aircraft.
- §1.1REGULATION — OFFICIAL DEFINITION
Armed Forces
Armed Forces means the Army, Navy, Air Force, Marine Corps, and Coast Guard, including their regular and reserve components and members serving without component status.
- §1.1REGULATION — OFFICIAL DEFINITION
Autorotation
Autorotation means a rotorcraft or powered-lift flight condition in which the lifting rotor is driven entirely by action of the air when the rotorcraft or powered-lift is in motion.
- §1.1REGULATION — OFFICIAL DEFINITION
Auxiliary rotor
Auxiliary rotor means a rotor that serves either to counteract the effect of the main rotor torque on a rotorcraft or to maneuver the rotorcraft about one or more of its three principal axes.
- §1.1REGULATION — OFFICIAL DEFINITION
Balloon
Balloon means a lighter-than-air aircraft that is not engine driven, and that sustains flight through the use of either gas buoyancy or an airborne heater.
- §1.1REGULATION — OFFICIAL DEFINITION
Brake horsepower
Brake horsepower means the power delivered at the propeller shaft (main drive or main output) of an aircraft engine.