The update seeks to correct what may have been the root cause of the crash of Lion Air Flight 610 in Indonesia last October-the Maneuvering Characteristics Augmentation System's (MCAS') reliance on a single sensor to determine whether the aircraft is entering a stall.
"There are, and I hasten to say, not conclusive, but there are similarities that exceed a certain threshold in our minds with respect to the possible cause of what happened in Ethiopia", Garneau said.
The delayed flight ET302 took off from Ethiopian capital Addis Ababa at 08:38 local time (05:38 GMT) and was bound for Kenyan capital Nairobi.
Visibility was said to be good but air traffic monitor Flightradar24 reported that the plane's "vertical speed was unstable after take-off".
At the time, United Airlines was the only US airline operating the aircraft.
Investigators have found the cockpit voice recorder and digital flight data recorder but it will be a while before the findings are made public. An investigation into that crash is focused on the plane's software system, which is created to push the plane down, according to Reuters.
United President Scott Kirby likes to say the average major airline will see several unexpected events each year. Authorities in France and Britain said they had not been approached yet. It operates 11 Boeing 737 MAX 8 and 2 MAX 9 jetliners. "It's just not comforting knowing that these pilots aren't prepared to deal with these new planes, or there's a malfunction with the autopilot", he said. As the European Union imposed its grounding, a number of 737 MAX aircraft were forced to turn around in flight because they were no longer considered airworthy at their destinations.
The system prevents the aircraft from pointing upwards at too high an angle, where it could lose its lift.
Most of the remains from Sunday's crash had been gathered in a hangar, said Dach, adding: "Hopefully, we will have some more information in two days' time".
There are reports the pilot of the doomed Ethiopian plan reported problems with the flight-control system and requested a return to the airport.
Even after numerous countries began to ground the planes to save lives, Boeing execs were said to be lobbying the government to keep the aircraft, and their stock price, aloft.
By the end of January, Boeing had delivered 350 of the Max 8 models. The website also showed a MAX 8 with Canadian airline WestJet taking off for Toronto before 3:30 p.m. It underwent a "rigorous first check maintenance" on 4 February, the airline said. He acknowledged Southwest might have trouble with operational reliability until its Max jets can fly again, but said it probably won't be material to its financial results. The Max 7 and 10 models, not yet delivered, are due for roll-out in the next few years.
In another case, the pilot said: "With the concerns with the MAX 8 nose down stuff, we thought it appropriate to bring it to your attention".
Mr. Trump said the US government had received "new information and physical evidence" both from the crash site and other places, as well as "a couple of other complaints", which led to the decision.
The airline said customers on canceled Max 8 flights can rebook on other flights without additional fees or fare differences within two weeks of their planned date of travel.
A spokesman for Ethiopian Airlines had said earlier that the black boxes recovered from the crashed plane would be sent to Germany for analysis.