Singapore didn't yet trigger a false. It's close but not yet. Banning the plane is not an Airworthiness Directive. If you make a new plane and you want to fly i

Singapore didn't yet trigger a false. It's close but not yet. Banning the plane is not an Airworthiness Directive. If you make a new plane and you want to fly it in FAA controlled airspace you need to get FAA approval and if you want to fly it in Singapore airspace you need SG CAAS approval, however due to the bilateral agreement, if you have a FAA approval this is a non-issue. Basically you get to skip the entire approval process except the very last step where the authority issues the approval itself. And, again, if Singapore did the unthinkable and deemed the 737 Max 8 not airworthy before the FAA did, then ... yes, everyone else would follow but that's not how this is done. Singapore practically says in the way this is done that the FAA should issue an AD and then they and everyone else would follow. To be honest, it's extremely likely at this point the FAA will cave in and issue a temporary AD within the next 24 hours until the dust clears. Right now they issued a "Continued Airworthiness Notification" https://www.faa.gov/news/updates/media/CAN_2019_03.pdf https://www.faa.gov/news/updates/media/CAN_2019_03.pdf and going straight against that is ... even in the Trump era, that's impossible. It would, without exaggeration, unravel the fabric of smooth international air travel. According to https://www.reuters.com/article/us-ethiopia-airplane-witnesses/ethiopian-plane-smoked-and-shuddered-before-deadly-plunge-idUSKBN1QS1LJ https://www.reuters.com/article/us-ethiopia-airplane-witness... the plane "was making a strange rattling noise and trailed smoke and debris" which very well might mean it was a very different issue to the Lion Air one.