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航空术语词典 Dictionary of Aeronautical Terms 上

时间:2011-03-11 23:11来源:蓝天飞行翻译 作者:admin 点击:


appropriate ATS authority (ICAO). The relevant authority designated by the state responsible for providing air traffic services in a particular airspace.
In the United States the “appropriate ATS authority” is the Program Director for Air Traffic Operations, ATO-1.
approved. 14 CFR Part 1: “Unless used with reference to another person, means approved by the Administrator.”
approved data. Data which may be used as authorization for the techniques or procedures employed when making an alteration or repair to an FAA-certificated aircraft.
Approved data consist of such documents as Type Certificate Data Sheets, Airworthiness Directives, Supplemental Type Certificates, and special repair instructions issued by the engineering department of the aircraft manufacturer and approved by the FAA.
approved inspection system. A program approved by the Federal Aviation Administration for the inspection and maintenance of an aircraft that will maintain the aircraft in an airworthy condition.
approved repair station. A facility approved and certificated by the Federal Aviation Administration under 14 CFR Part 145 Repair Stations to perform certain types of repairs to certificated aircraft.
Approved Type Certificate. See ATC.
approximate. Something that is nearly, but not exactly, correct. Approximate also means close to, but not exactly at the same location.
apron (aircraft service area). The paved area in front of an aircraft hangar where aircraft can be parked and tied down. Aprons are sometimes called ramps or tarmacs.
APU (auxiliary power unit). A small self-contained turbine- or reciprocating-engine-powered generator, hydraulic pump, and air pump.
APUs are installed in an aircraft and are used to supply electrical power, air, and hydraulic pressure for ground operation and for starting the main engines.
Aqua dag. The registered trade name for a lubricant made of graphite suspended in water. Aqua-dag is used as a lubricant for components in an oxygen system. Oil or other petroleum products cannot be used with oxygen system components, because the oxygen can react with the petroleum to cause it to spontaneously ignite and burn.
arabic numerals. The numerals 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9.
aramid fibers. Fibers made from an organic compound of carbon, hydrogen, oxygen, and nitrogen. They have high strength and low density and are flexible under load. They have the ability to withstand impact, shock, and vibration. Kevlar. is a well-known aramid fiber.
arbor press. A press with either a mechanically or hydraulically operated ram used in a maintenance shop for a variety of pressing functions.
arc (geometric figure). The portion of the circumference of a circle between any two points on the circumference.
arc (trigonometric function). A prefix used with trigonometric functions. Arc means the inverse, or the opposite, of a function, or the angle whose function is the number given.
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