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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.
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. It contains measures which must be ...
One airworthiness regulation is found in ICAO international standard of Annex 8 to Chicago Convention on International Civil Aviation which defines "airworthy" - in respect of an aircraft, engine, propeller or part there of - as "The status of an aircraft, engine, propeller or part when it conforms to its approved design and is in a condition for safe operation".
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]
In the U.S., the MAX shares a compatible type rating throughout the Boeing 737 series. [25] The impetus for Boeing to build the 737 MAX was serious competition from the Airbus A320neo, which was a threat to win a major order for aircraft from American Airlines, a traditional customer for Boeing airplanes. [26]
Aircraft continuous airworthiness monitoring ACARS Aircraft Communications Addressing and Reporting System: ACAS Airborne collision avoidance system: ACC Area control centre [1] ACC Active clearance control: Turbine engine system ACC Accessory In gas turbine engine ACE Actuator control electronics ACFT Aircraft [3] ACI Airports Council ...
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. The Airworthiness Directive was finally cancelled on 12 June 2024. [3]
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.