Which term describes the overall condition of conforming to design and being safe for flight?

• A. Airworthiness
• B. Airworthiness Certificate
• C. Airworthiness Directive
• D. Alternate air

Answer: (A)

Airworthiness is the state of the airplane where it conforms to its approved design and is safe to fly. It means the aircraft, its engines, propellers, and systems meet the required specifications and have been maintained to keep that design integrity, including compliance with any applicable airworthiness directives. The term describes the overall condition, not a certificate or a specific instruction. The Airworthiness Certificate is the document that proves airworthiness, but the question focuses on the condition itself. An Airworthiness Directive is a mandatory safety requirement issued to fix a known issue, and Alternate air refers to a system’s secondary air source, not the overall flight safety condition.