The Federal Aviation Administration's acting chief, Dan Elwell, said Wednesday that Boeing plans to submit a fix for its anti-stall software "in the next week or so," after months of pressure on the company to respond to the two crashes that killed a total of 346 people.
Elwell said at a congressional hearing that the agency will only allow the jets to fly again once it's "absolutely safe to do so ... It's important we get this right."
Boeing's Max jets have been grounded since March, which has forced airlines to cancel thousands of flights through the summer.
At Wednesday's hearing, House Transportation and Infrastructure Committee Chairman Peter DeFazio told the FAA that it must "get it right" in deciding when the Max will return to flight.
"The world is watching and the FAA and Boeing must get it right," the Oregon Democrat said.