Service Bulletins (BSs) are issued by the manufacturer and provide details of modifications or other airworthiness related information. They may be mandatory, optional or simply provide additional data. Over the life of the Airtourer, SBs have been issued by Victa, AESL, NZAI and the Airtourer Cooperative.
The current list of SBs are listed in Cooperative Service Bulletin 02.
Full copies of current SBs can be accessed by Co-op members after logging in via a linked copy of Co-op Service Bulletin 02. (Some SBs are yet to be scanned and uploaded.)