Service bulletins include effectivity, compliance recommendations, material, manpower and accomplishment instructions. Access may be controlled by the manufacturer.
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AIRWORTHINESSINTERMEDIATEREVIEWED Aug 2026
SB
SB Abbreviation · Service Bulletin Synonym
Service Bulletin: manufacturer-issued technical information about inspections, modifications or product changes.
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How the term is used
An SB can communicate inspections, modifications, replacements, software changes or product improvements. Its regulatory significance depends on the applicable authority, operator program and whether an AD or other approval makes action mandatory.
Where you may encounter it
Engineering, planning and maintenance teams assess applicable SBs and incorporate approved actions through controlled work packages.
Do not assume that every SB is mandatory or that an SB alone authorizes work. Confirm the approved compliance basis.