When I first heard the term AS9100D machine shop, I honestly thought it was just ISO 9001 with a fancy aerospace label slapped on it. I was wrong. Very wrong. Running an AS9100D-certified machine shop isn’t just about paperwork or passing an audit once every year. It’s a mindset shift, and it took me years of mistakes, late nights, and a few near heart attacks to really get it right. I remember the first aerospace RFQ that landed on my desk. Tight tolerances, full traceability, first article inspection, and more acronyms than I care to remember. I almost didn’t quote it because it looked intimidating. That moment changed everything. Why…