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An airworthiness directive (commonly abbreviated as AD) is a notification to owners and operators of certified aircraft that a known safety deficiency with a particular model of aircraft, engine, avionics or other system exists and must be corrected. [1][2] If a certified aircraft has outstanding airworthiness directives that have not been ...
Airworthiness. Blériot XI, civil registration G-AANG. Built in 1909 and operated by the Shuttleworth Collection in the United Kingdom, this is the world's oldest airworthy aircraft. In aviation, airworthiness is the measure of an aircraft 's suitability for safe flight. Initial airworthiness is demonstrated by a certificate of airworthiness ...
The aircraft design is thus compromised. The regulators will now issue an airworthiness directive to the type certificate holder and to all owners globally. The directives normally consists of additional maintenance or design actions that are necessary to restore the type's airworthiness.
Emergency airworthiness directive. An emergency airworthiness directive (EAD) is an airworthiness directive issued when unsafe conditions require immediate action by an aircraft owner or operator. An EAD is published by a responsible authority such as the FOCA, EASA or FAA related to airworthiness and maintenance of aircraft and aircraft parts.
A certificate of airworthiness (CoA), or an airworthiness certificate, is issued for an aircraft by the civil aviation authority in the state in which the aircraft is registered. The CoA attests that the aircraft is airworthy insofar as the aircraft conforms to its type design. Each certificate is issued in one of a number of different ...
Aviation safety. AC 25.1309–1 is an FAA Advisory Circular (AC) (Subject: System Design and Analysis) that identifies acceptable means for showing compliance with the airworthiness requirements of § 25.1309 of the Federal Aviation Regulations. Revision A was released in 1988. In 2002, work was done on Revision B, but it was not formally ...