There are runways and parking lots in Washington full of undelivered planes which are waiting on contractual disputes related to the quality assurance of the 737 MAX issues. A significant percentage of Boeing planes are currently undeliverable and post-pandemic world airlines are likely going to cancel / downsize contracts or at least spend significant legal fees to attempt to do so.
Barring a quick and easy vaccination or herd immunity that accidentally happens much faster than expected, travel is unlikely to recover this year and perhaps not next. Clearing their backlog of planes will likely take 4+ years unless the company can convince people and airlines to trust them again.