Boeing has flown its latest version of the 737, the Max 7, for the first time, the company announced last week. The airplane flew for just over three hours, taking off from Renton, Washington, and landing at Boeing Field in Seattle. The flight crew tested the flight controls, systems and handling qualities. The airplane is the third one in the 737 Max family. It’s equipped with CFM International Leap-1B engines and Advanced Technology winglets.