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Airworthiness : ウィキペディア英語版
Airworthiness

Airworthiness is the measure of an aircraft's suitability for safe flight. Certification of airworthiness is initially conferred by a certificate of airworthiness from a national aviation authority, and is maintained by performing the required maintenance actions.
The application of airworthiness defines the condition of an aircraft and supplies the basis for judgment of the suitability for flight of that aircraft, in that it has been designed with engineering rigor, constructed, maintained and is expected to be operated to approved standards and limitations, by competent and approved individuals, who are acting as members of an approved organization and whose work is both certified as correct and accepted on behalf of the State.
An example of an aircraft that was not legally airworthy is Larry Walters' "Lawn chair flight" in 1982.
In the U.S., Title 14, Code of Federal Regulations, Subchapter F, Part 91.7 states: "a) No person may operate an aircraft unless it is in an airworthy condition. b) The pilot in command of a civil aircraft is responsible for determining whether that aircraft is in condition for safe flight. The pilot in command shall discontinue the flight when unairworthy mechanical, electrical, or structural conditions occur."
The USA Federal Aviation Regulations, Part 21, §21.183(d) has a procedural definition of airworthy:

"''other aircraft'' An applicant for a standard airworthiness certificate for aircraft not covered by paragraphs (a) through (c) (a:"New aircraft manufactured under a production certificate." b:"New aircraft manufactured under type certificate only." c:"Import aircraft.") of this section is entitled to a standard airworthiness certificate if --
(1) He presents evidence to the Administrator that the aircraft conforms to a type design approved under a type certificate or a supplemental type certificate and to applicable Airworthiness Directives;
(2) The aircraft (except an experimentally certificated aircraft that previously had been issued a different airworthiness certificate under this section) has been inspected in accordance with the performance rules for 100-hour inspections set forth in part 43.15 of this chapter and found airworthy by--
(i)The manufacturer;
(ii)The holder of a repair station certificate as provided in part 145 of this chapter;
(iii)The holder of a mechanic certificate as authorized in part 65 of this chapter;
(v)The holder of a certificate issued under part 121 of this chapter, and having a maintenance and inspection organization appropriate to the aircraft type; and
(3)The Administrator finds after inspection, that the aircraft conforms to the type design, and is in condition for safe operation."
The true definition of the word "Airworthy" was never included in the Code of Federal Regulations until the 14 CFR Part 3, General Requirements, was established. The definition was included in the guidance, such as Advisory Circulars and Orders, but never in the Rule. Part 3 defines the definition of Airworthy as, the aircraft conforms to its type design and is in a condition for safe flight.
A more generic and non-process oriented definition is required. Airworthiness is defined in JSP553 Military Airworthiness Regulations (2006) Edition 1 Change 5 as:
''The ability of an aircraft or other airborne equipment or system to operate without significant hazard to aircrew, ground crew, passengers (where relevant) or to the general public over which such airborne systems are flown''
This definition applies equally to civil and military aircraft. However, military aviation despite being governed by regulations, this is performed in a less standardized and more fragmented way as compared to civil aviation.〔(【引用サイトリンク】title=Military Airworthiness Management Frameworks: A Critical Review )
An example of a method used to delineate "significant hazard" is a risk reduction technique used by the military and used widely throughout engineering known as ALARP (As Low As Reasonably Practicable). This is defined as:
‘''The principle, used in the application of the Health and Safety at Work Act, that safety should be improved beyond the baseline criteria so far as is reasonably practicable. A risk is ALARP when it has been demonstrated that the cost of any further Risk reduction, where cost includes the loss of capability as well as financial or other resource costs, is grossly disproportionate to the benefit obtained from that Risk reduction''.’
In Canada Canadian Aviation Regulations, CAR 101.01, Subpart 1 - Interpretation Content last revised: 2007/12/30

"airworthy" - in respect of an aeronautical product, means in a fit and safe state for flight and in conformity with its type design;
==See also==

* Air safety
* EASA

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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