April 19, 2016| 2

What Are Airworthiness Directives?

Dr. Mary Ann O’Grady The Federal Aviation Administration (FAA) issues legally enforceable Airworthiness Directives or ADs for the purpose of correcting an unsafe condition in an aircraft, aircraft engine, propeller, or appliance under 14 CFR Part 39 . The FAA Aircraft Certification Service maintains 12 Aircraft Certification Offices (ACOs) with …

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