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What should an owner or operator know about Airworthiness Directives (AD's)?

A

They are mandatory.✓ Correct Answer

B

They are voluntary.

C

For Informational purposes only.

Explanation

Airworthiness directives are legally enforceable rules (14 CFR 39.3), and 39.7 says anyone who operates a product that does not meet an applicable AD is in violation. They are mandatory, not voluntary or informational.

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