What must aircraft comply with to be considered airworthy?

• A. Aircraft must be registered
• B. Aircraft must be maintained regularly
• C. Aircraft must conform to its type design
• D. Aircraft must have insurance

Answer: (C)

To be considered airworthy, an aircraft must conform to its type design. This requirement is fundamental in aviation safety as it ensures that the aircraft’s construction, materials, and systems align with the specifications approved by the aviation authority during the design process. Compliance with the type design means that any modifications or repairs made to the aircraft are also in accordance with the approved standards and have been properly documented and certified.

This concept is essential because even if an aircraft has been registered, maintained regularly, or has adequate insurance, it would still be deemed unairworthy if it does not conform to its type design. Conformance ensures that safety, performance, and reliability standards are met, which is critical for effective operation and to safeguard both passengers and crew. It is a primary factor in determining whether an aircraft can legally and safely operate in the sky.