Airworthiness Directive: Legally enforceable regulations issued by the FAA in accordance with 14 CFR part 39 to correct an unsafe condition in a product.
European Union Aviation Safety Agency: The central regulatory body for civil aviation safety in the European Union.
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Parts Manufacturing Approval: A combined design and production approval issued by the FAA to produce modification or replacement parts for sale and installation on type-certificated aircraft. It certifies that the aftermarket part meets FAA safety, quality, and airworthiness standards.
Safety Alert for Operators: An FAA publication that provides critical safety-related information, often recommending specific actions for air carriers, operators, and training providers to address emerging hazards. It serves to educate and improve safety protocols.
Special Airworthiness Information Bulletin: An information tool used by the FAA to alert, educate, and make non-regulatory recommendations to the aviation community regarding safety issues.
A document issued by aircraft, engine, or component manufacturers to communicate recommended modifications, inspections, or maintenance procedures for improved safety, reliability, or performance.
Also called a Service Information Letter (SIL), it is a non-mandatory, informational document issued by an aircraft or component manufacturer to recommend best practices, provide service updates, or enhance product reliability and safety.
A formal written communication used within organizations — such as airlines, regulatory bodies (FAA/EASA), or maintenance facilities — to convey official information, directives, or guidance.
Supplemental Type Certificate: An official approval issued by aviation authorities (such as the FAA) for a major modification or alteration to an aircraft, engine, or component that was previously certified. It verifies that the modification meets safety standards and does not degrade the aircraft's original airworthiness.
Transport Canada Civil Aviation: The national authority responsible for regulating and overseeing civil aviation safety in Canada.
Type Certificate Data Sheet: An official document issued by a regulatory authority (like the FAA or EASA) that records the essential specifications, limitations, and requirements for a type-certified aircraft, engine, or propeller.