This article has been reviewed according to Science X's editorial process and policies . Editors have highlighted the following attributes while ensuring the content's credibility: The second Boeing 737 MAX airplane being built is on the assembly line in Renton, Wash., on Monday, Dec. 7, 2015. Credit: AP Photo/Ted S. Warren, File Boeing is getting back the ability to perform final safety inspections on 737 Max jetliners and certify the planes for flight more than six years after crashes of the then-new mod ...