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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.
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 ...
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.
On 13 September 2007, Transport Canada issued an Airworthiness Directive applicable to Bombardier Q400 turboprop aircraft instructing all Q400 aircraft operators to conduct a general visual inspection of the left and right main landing gear systems and main landing gear retract actuator jam nuts. This effectively grounded all Q400 aircraft ...
On February 26, 2020, the FAA has proposed a corresponding airworthiness directive to mandate repairs to all affected aircraft. [ 180 ] In January 2020, the FAA proposed a $5.4 million fine against Boeing for installing nonconforming slat tracks.
A standard certificate of airworthiness is a permit for commercial passenger or cargo operation, issued for an aircraft by the civil aviation authority in the state/nation in which the aircraft is registered. For other aircraft such as crop-sprayers, a Special Airworthiness Certificate (not for commercial passenger or cargo operations) must be ...
The FAA also uses advisory circulars to officially recognize "acceptable means, but not the only means," of accomplishing or showing compliance with airworthiness regulations. [ 3 ] [ 4 ] Advisory circulars may also contain explanations, clarifications, best practices, or other information of use to the aviation community.
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.