Who issues Service Bulletins concerning an improvement or change that may be made on an aircraft?

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Multiple Choice

Who issues Service Bulletins concerning an improvement or change that may be made on an aircraft?

Explanation:
Service Bulletins come from the aircraft manufacturer. They’re notices that describe design changes, improvements, or recommended inspections or actions for a specific model to enhance safety and reliability. These bulletins are informational in themselves, not regulatory until the FAA issues an Airworthiness Directive that references them. In short, the manufacturer issues the bulletin; the FAA issues directives, and owners or maintenance shops aren’t the source of the bulletin.

Service Bulletins come from the aircraft manufacturer. They’re notices that describe design changes, improvements, or recommended inspections or actions for a specific model to enhance safety and reliability. These bulletins are informational in themselves, not regulatory until the FAA issues an Airworthiness Directive that references them. In short, the manufacturer issues the bulletin; the FAA issues directives, and owners or maintenance shops aren’t the source of the bulletin.

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