An airworthiness directive is a mandatory regulatory instruction issued by an aviation authority to correct an unsafe condition on an aircraft, engine, propeller, or appliance. In maintenance and continuing airworthiness documentation, the term appears as a compliance item with effective dates, applicability, required corrective actions, recurring inspection or modification requirements, and specific product serial-number ranges that must be tracked in maintenance records.
Translators work with airworthiness directives in maintenance records, continuing airworthiness management systems, service bulletins, and regulatory correspondence. The term appears in compliance tables, logbook entries, and safety communications, often alongside the abbreviation AD. Localization must reproduce mandatory wording carefully because operators use translated texts to schedule inspections and demonstrate continuing airworthiness.
A common error is softening "mandatory" to "recommended" or translating directive as "指导" rather than "指令." Some translators also confuse an airworthiness directive with a service bulletin, which may be voluntary unless mandated. This can cause an operator to miss required compliance actions, creating a safety and regulatory exposure that may affect the aircraft's continuing airworthiness status.
EASA and CE certification impose language requirements on maintenance and safety documentation. These terms carry airworthiness and liability implications, so they are rendered against the governing standard rather than translated freely.
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