If you run a Manufactures SOM then you MUST comply with the SB
yr right,
Not so, many OEM SBs are not airworthiness items.
To incorporate them or not is a matter for the registered operator. Of course, and SB that an NAA makes an AD is a different matter. If a LBS says that all OEM SBs have to be carried out, that LBS is NOT enforceable, in that respect.
What many of you "just don't get" is that the OEM MM forms part of the acceptable ( CASA Approved) data that must be used to complete Schedule 5, but is not the only data required.
The other thing that many of you "don't get" is that FAA certified light aircraft assume that they will be maintained to FAR 43 Appendix D (which is the same as Schedule 5, almost) and the OEM MM does not include in the MM a lot of information contained in various FAA ACs related to continuing airworthiness.
Tootle pip!!