Plain English Meaning
The FAA's formal recognition that an aircraft is legally and physically fit to fly. It is established by paperwork (the airworthiness certificate) and kept valid by ongoing inspections and maintenance.
Full Definition
The legally recognized condition of an aircraft as established by the FAA, indicating whether it conforms to its approved type design and is in a condition for safe operation. This status is documented through the airworthiness certificate issued under 14 CFR Part 21 and is maintained through compliance with applicable airworthiness directives, required inspections, and maintenance records.
Context Anchor
Encountered during preflight , aircraft , checks, and instructor decisions about whether an aircraft may be used for a lesson.