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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.
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.
EASA is responsible for new type certificates and other design-related airworthiness approvals for aircraft, engines, propellers and parts. EASA works with the EU member states' civil aviation authorities (CAAs) but has taken over many of their functions in the interest of aviation standardisation across the EU and in the non-EU member Turkey. [12]
DO-178C, Software Considerations in Airborne Systems and Equipment Certification is the primary document by which the certification authorities such as FAA, EASA and Transport Canada approve all commercial software-based aerospace systems.
In aviation safety, master minimum equipment list, or MMEL, is a categorized list of on-board systems, instruments and equipment that may be inoperative for flight in a specified aircraft model.
EASA wrote a certification memoranda to require the use of DO-254 for all complex electronics within a system, stating that all equipment and CBA with a Design assurance classification of A, B, C or D should meet level D objectives for the equipment and CBA, regardless of the DAL of the system or aircraft function.
The European Aviation Safety Agency (EASA) was created in 2003 and reached full functionality in 2008, and has since taken over most of the JAA functions. JAA Certification Specifications, formerly known as JARs, are recognised by EASA as an acceptable basis for showing compliance with their national airworthiness codes.
Robin Aircraft reported bonding issues in seven batches of DR400 wing spars in December 2022. Emergency Airworthiness Directive 2022-0267-E was issued by EASA on 27 December 2022. [2] This EAD was reviewed by EASA following submission of data that showed that all the wing spars exceeded their design specification.