Another unintended consequence of having so many aircraft parked for so long not operating is bringing them back to life and flying them. It's never been done

Another unintended consequence of having so many aircraft parked for so long not operating is bringing them back to life and flying them. It's never been done on such a large scale, and there have been numerous documented instances of emergencies involving fuel pumps on 737s causing in-flight shutdowns of engines due to the aircraft sitting for so long and getting in an unstable state. Boeing even had to send out a directive to all airlines to double and triple check certain components on aircraft that have sat for so long. Aircraft, just like cars, are designed to be continuously flown and running, not sitting around.