In the United States, aviation mechanics are trained primarily to be generalists who can safely operate on any aircraft. Airline regulation may create specializ

In the United States, aviation mechanics are trained primarily to be generalists who can safely operate on any aircraft. Airline regulation may create specializations. The manufacturer needs to provide parts and certain highly specialized services (like rebuilding damaged wings, for example.) That parts and service supply is wrapped up in a "Type Certification Ownership". That type ownership is a valuable thing, because it's a guaranteed population of customers. Therefore, when aviation companies fail, the type ownership is auctioned off, and it will be bought.