An added streamlining structure or auxiliary member, most often of light metal, whose only purpose is to reduce drag. Fairings are not load-bearing and, therefore, are not meant to carry any principal air loads placed on the airplane structure.

SEE RADIO NAVIGATION

Fixed-Base Operator, a commercial operator supplying fuel, maintenance, flight training, and other services at an airport.

In the event of engine failure, the process of adjusting a controllable-pitch propeller to a pitch position where the blade angle is about 90° to the plane of rotation in order to stop windmilling.

FAR Part 91 - General Aviation (portions apply to all operators) FAR Part 103 - Ultralight Vehicles FAR Part 105 - Parachute Jumping FAR Part 108 - Airplane Operator Security FAR Part 119 - Certification: Air Carriers and Commercial Operators FAR Part 121 - Domestic, Flag, and Supplemental Air Carriers and Commercial Operators of Large Aircraft FAR Part 123 - Travel Clubs FAR Part 125 - US Civil Airplanes, seating 20 or more passengers or a maximum payload capacity 6,000# or more FAR Part 127 - Air Carriers using helicopters for scheduled interstate flights (within the 48 contiguous states) FAR Part 129 - Foreign Air Carrier and Foreign Operators of US registered aircraft engaged in common carriage FAR Part 133 - Rotorcraft External Load Operations FAR Part 135 - Air Taxi Operators and Commercial Operators FAR Part 137 - Agricultural Aircraft Operations FAR Part 141 - Pilot School

A flight for the purpose of (1) returning an aircraft to base; (2) delivering an aircraft from one location to another; (3) moving an aircraft to and from a maintenance base. Ferry flights, under certain conditions, may be conducted under terms of a special flight permit.

The fixed part of a vertical airfoil that controls the yaw of an aircraft; the movable part being the RUDDER. Sometime referred to as Vertical Stabilizer.

A fire-resistant bulkhead that isolates the engine from other parts of an airplane's structure.

A rudder-controlled side-to-side [yawing] motion to reduce air speed, generally prior to landing.

In radio jargon, affirms that a radioed transmission was received clear and loud. Rated one to five, with the first figure for clearness and the second second for loudness.

A movable, usually hinged airfoil set in the trailing edge of an aircraft wing, designed to increase lift or drag by changing the camber of the wing or used to slow an aircraft during landing by increasing lift. Also see FOWLER FLAP, SLOTTED FLAP, and SPLIT FLAP.

A control surface combining the functions of a flap and an aileron.

A maneuver performed moments before landing in which the nose of an aircraft is pitched up to minimize the touchdown rate of speed.

An aircraft's performance limits, specifically the curves of speed plotted against other variables to indicate the limits of speed, altitude, and acceleration that a particular aircraft can not safely exceed.

A level of constant atmospheric pressure related to a reference datum of 29.92 inches of mercury. Each is stated in three digits that represent hundreds of feet — flight level 250 represents a barometric altimeter indication of 25,000'; flight level 255 an indication of 25,500'.

Specified information relating to the intended flight of an aircraft that is filed orally or in writing with an FSS or an ATC facility.

Air traffic facilities which provide pilot briefing, enroute communications and VFR search and rescue services, assist lost aircraft and aircraft in emergency situations, relay ATC clearances, originate Notices to Airmen, broadcast aviation weather and NAS information, receive and process IFR flight plans, and monitor NAVAIDs. In addition, at selected locations, FSSs provide Enroute Flight Advisory Service (Flight Watch), take weather observations, issue airport advisories, and advise Customs and Immigration of transborder flights.

A water-based aircraft with one or more mounted pontoons, as differentiated from a hulled SEAPLANE or Flying Boat, but sometimes used generically.

Interplane bracing wires that help support wingloads when the plane is in flight. Direction of travel is upward and outward from the fuselage to the interplane struts. Also known as LIFT WIRES, the opposite of LANDING WIRES.

Trademark name of a split-flap attached to a wing through a system of tracks and rollers to roll the flap backward and downward, increasing the wing area.

A type of aileron that has a beveled leading edge projecting beyond its inset hinges. When lowered, it forms an extension of the wing surface; when raised, its nose protrudes below the wing, increasing drag and reducing yaw. Named for its inventor, British engineer Leslie George Frise.

SEE FLIGHT SERVICE STATION

An aircraft's main body structure housing the flight crew, passengers, and cargo and to which the wings, tail and, in most single-engined airplanes, engine are attached. French: fuselé,tapering.