Meeting standards for safe flight

The state of being airworthy.

comparative form of airworthy: more airworthy

(aviation, law) A regulation issued by the civil aviation authority of a country or region, generally in response to the discovery of an unsafe condition affecting particular aircraft, requiring that certain actions (such as specified modifications or enhanced maintenance or inspection requirements) be performed on these aircraft in order for them to remain legally airworthy.

plural of airworthiness directive