As I understand it, once the Max has been rectified, each and every plane still needs to be updated and checked off as well.
How does the re-certification of the individual planes work? Will these planes need to be flown back to a Boeing facility? Many of these Max are on the ground scattered all over the world. Will local facilities be allowed to make the necessary changes? If done outside the USA, would each plane still require to be inspected by the FAA or will that be done by the respective local aviation authority?