If you follow this site, you know that I have written a number of articles and posts regarding the thorny issue of service bulletin compliance. The question posed by those faced with the issue is “When do I have to comply with a service bulletin?”. The lawyerly answer to the question is, “it depends”. Not very satisfying, I know. However, service bulletin compliance truly does depend upon the perspective from which you are analyzing the issue.
To help explain and clarify the service bulletin compliance, I recently prepared a somewhat comprehensive article that appears in the latest edition of the American Bar Association Forum on Air and Space Law’s publication, The Air & Space Lawyer. You can read the article here. Although the article may not definitely answer the question for you, I hope it at least gives you a framework from which to formulate your own answer to the question.