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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.
The Federal Aviation Administration published a Notice of Proposed Rule Making for an airworthiness directive that would make ultrasonic inspections mandatory on Boeing 747-400, 400D and 400F aircraft. The "Airworthiness Directive; Boeing Model 747-400, -400D, and -400F Series Airplanes" was published in the federal register on August 28, 2003.
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 ...
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.
The Certification of Aircraft Electrical and Electronic Systems for Operation in the High Radiated Fields (HIRF) Environment: AC 25.1309-1: System Design and Analysis: ARP4754, ARP4761: AC 20-174 Development of Civil Aircraft and Systems: ARP4754A AC 43.13-1B: Acceptable Methods, Techniques, and Practices - Aircraft Inspection and Repair: AC 70-1
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.