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Service Bulletin (SB)

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Article Information
Category: Airworthiness Airworthiness
Content source: SKYbrary About SKYbrary
Content control: SKYbrary About SKYbrary
Publication Authority: SKYbrary SKYbrary


A Service Bulletin is the document used by manufacturers of aircraft, their engines or their components to communicate details of modifications which can be embodied in aircraft. In some cases, these may be issued as a Mandatory SB (or MSB) in which case a corresponding Airworthiness Directive (AD) will be issued by the appropriate National Aviation Authority (NAA).

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