1) The airplane must undergo strict maintenance checks to ensure it remains air-worthy.

2) The aircraft was deemed air-worthy after passing all safety inspections.

3) Pilots are responsible for confirming that their planes are air-worthy before takeoff.

4) The mechanic certified the helicopter as air-worthy after replacing a faulty part.

5) It's crucial to regularly assess the structural integrity of an aircraft to keep it air-worthy.

6) The vintage plane had to undergo extensive restoration to make it air-worthy again.

7) The small aircraft was grounded until it could be made air-worthy following a mechanical issue.

8) The aviation authority conducts regular audits to confirm that all aircraft in operation are air-worthy.

9) The airline invested in state-of-the-art equipment to ensure their fleet remains air-worthy.

10) The captain refused to fly the plane until it was confirmed to be air-worthy by a qualified engineer.