WASHINGTON—The U.S. Federal Aviation Administration said on Monday it is proposing requiring four key Boeing Co. 737 MAX design changes to address safety issues seen in two crashes that killed 346 people and led to the plane’s grounding in March 2019.
The agency is issuing a proposed airworthiness directive to require updated flight-control software, revised display-processing software to generate alerts, a revision of certain flight-crew operating procedures and changes in the routing of some wiring bundles.
