Can anyone of you aviation nerds out there explain what an “STC” is, in a paragraph or so? I know it is a “supplemental type certification”, some kind of permission by the FAA to make certain modifications on your aircraft, right? But I tried to sum it up correctly in a couple of senctences for our un-initiated readers and failed miserably. Usually Mike writes about this kind of technical stuff here, but he’s gone flying somewhere and I chose this strip last minute. So, geeks to the rescue!