21.A.3B Airworthiness directives

• Regulation (EU) No 748/2012 found in: Initial Airworthiness and Environmental Protection (748/2012) Part-21 Part-21L (Jul 2024)
• Regulation (EU) 2024/1108 found in: Initial Airworthiness and Environmental Protection (748/2012) (Nov 2025)

21.A.3B Airworthiness directives Regulation (EU) No 748/2012 (a)     An airworthiness directive means a document issued or adopted by the Agency which mandates actions to be performed on an aircraft to restore an acceptable level of safety, when evidence shows that the safety level of this aircraft may otherwise be compromised. (b)     The Agency shall issue an airworthiness directive when: 1.       an unsafe condition has been determined by the Agency to exist in an aircraft, as a result of a deficiency in the aircraft, or an engine, propeller, part or appliance installed on this aircraft; and 2.       that condition is likely to exist or develop in other aircraft. (c)      When an airworthiness directive has to be issued by the agency to correct the unsafe condition referred to in point (b), or to require the performance of an inspection, the holder of the type-certificate, restricted type-certificate, supplemental type-certificate, major repair design approval, ETSO authorisation or any other relevant approval deemed to have been issued under this Regulation, shall: 1.       propose the appropriate corrective action or required inspections, or both, and submit details of these proposals to the Agency for approval; 2.       following the approval by the Agency of the proposals referred to under point (1), make available to all known operators or owners of the product, part or appliance and, on request, to any person required to comply with the airworthiness directive, appropriate descriptive data and accomplishment instructions. (d)     An airworthiness directive shall contain at least the following information: 1.       an identification of the unsafe condition; 2.       an identification of the affected aircraft; 3.       the action(s) required; 4.       the compliance time for the required action(s); 5.       the date of entry into force. #### 21.A.3B Airworthiness directives *Regulation (EU) 2024/1108* (a) An airworthiness directive means a document issued or adopted by the Agency which mandates actions to be performed on an aircraft or on a CMU to restore an acceptable level of safety, when evidence shows that the safety level of the aircraft, UAS or CMU may otherwise be compromised. (b) The Agency shall issue an airworthiness directive when: 1. an unsafe condition has been determined by the Agency to exist in an aircraft, a UAS or a CMU, as a result of a deficiency in the aircraft, or an engine, propeller, part or appliance installed on this aircraft, or as a result of a deficiency in the CMU or the CMU component; and 2. that condition is likely to exist or develop in other aircraft, UAS or CMUs. (c) When an airworthiness directive has to be issued by the Agency to correct the unsafe condition referred to in point (b), or to require the performance of an inspection, the holder of the type‑certificate, restricted type‑certificate, supplemental type‑certificate, major repair design approval, ETSO authorisation or any other relevant approval deemed to have been issued under this Regulation, shall: 1. propose the appropriate corrective action or required inspections, or both, and submit details of these proposals to the Agency for approval; and 2. following the approval by the Agency of the proposals referred to in point 1, make available to all known operators or owners of the product, part, appliance, UAS, CMU or CMU component and, on request, to any person required to comply with the airworthiness directive, appropriate descriptive data and accomplishment instructions. (d) An airworthiness directive shall contain at least the following information: 1. an identification of the unsafe condition; 2. an identification of the affected aircraft or CMU; 3. the action(s) required; 4. the compliance time for the required action(s); 5. the date of entry into force of the airworthiness directive.