The U.S. Federal Aviation Administration cleared the planes for flight early Wednesday, 20 months after Ethiopian Airlines flight 302 went down near Addis Ababa, killing all 157 on board — including 18 Canadians.
The move would come after numerous congressional hearings on the crashes that led to criticism of the FAA for lax oversight.
Boeing and the FAA declined to comment on the legislation.
Chief Executive Dave Calhoun told employees Boeing now expects to eliminate some 30,000 jobs to reach a workforce around 130,000 by end-2021.
The planes have been grounded since March 2019, after the second fatal crash.