The SIDs came early to the 337 Skymasters. At the time they did, I was heavily involved in the Skymaster forum as I was about to buy one and there was a lot of talk about the SID. For part 91 you do
not have to perform the teardown to comply, just as you don't have to tear your engine down at 2000hrs or every 12 years to comply with what Lycoming says.
Basically, the airworthiness of an aircraft is an FAA responsibility. No private entity, no matter how many SIDs they produce, can ground an aircraft or force you to do anything. So unless the SID is an AD - for part 91 where you don't service according to manufacturers - then it is only advisory.
Now, that might not be the case anywhere else - notice how in Europe they interpret it as you
have to tear down your engine at TBO or 12 years. So depending on how you word it or have the type certificate set up, any compliance would have to be to manufacturers specifications.
This has much greater implementations legally than people think. Because
if this SID will be grounds for grounding anywhere else, then it will mean that any private entity, now, or in the future, can come up with their own legislation that you need to comply with but without having to inform you about it when you buy the product. Imagine this taken to it's logical conclusion - you buy a dish washer, but 5 years down the road the manufacturer invents a "problem" with the design, forcing you to repair it for more than a new one or replace it at great cost. Would you accept that? What if it was your car? Your house?
Here's a legal clarification from the Conquest owners:
http://www.conquestowners.org/images..._DOCUMENTS.pdf