luftvärdighetscertifikat
Luftvärdighetsdirektiv is a German term that translates to Airworthiness Directive (AD) in English. An AD is a mandatory instruction issued by a national aviation authority to correct an unsafe condition in an aircraft, engine, propeller, or appliance. These directives are typically issued when a defect or malfunction is discovered that could compromise the safety of flight.
Luftvärdighetsdirektivs are legally binding and must be complied with by the owners and operators of the affected
Aviation authorities, such as the German Federal Aviation Office (Luftfahrt-Bundesamt - LBA) or the European Union Aviation