What FAA directive is issued to notify concerned parties of an unsafe condition and describe the corrective action?

• A. Airworthiness Directive
• B. Agonic Line
• C. Altimeter
• D. Angle of Attack

Answer: (A)

An Airworthiness Directive is an FAA-issued directive that announces an unsafe condition in an aircraft, engine, propeller, or appliance and prescribes mandatory corrective actions. It ensures all affected operators are informed and required actions are taken to restore safety, typically detailing the unsafe condition, its potential consequences, the models or serial numbers affected, and the specific steps needed—such as inspections, modifications, replacements, or operating restrictions—with defined compliance times. These directives are issued to notify concerned parties, including aircraft owners, operators, and maintenance personnel, and become legally enforceable for all affected equipment. The other terms—an agonic line related to compass variation, an altimeter as an altitude-reading instrument, and angle of attack related to flight dynamics—do not convey a mandatory corrective action to address an unsafe condition.