The Boeing 737 Max is in the news again, this time because the door plug on a brand-new plane came off soon after take-off. The pilots of the Alaska Airlines flight from Portland, Oregon, managed to return the Max 9 safely to Portland International Airport, but the consequences would have been far more serious had the incident occurred at cruising height a few minutes later. Alaska Airlines and fellow US carrier United Airlines have also discovered loose hardware and connections on their fleets ...