The three USA airlines using the 737 MAX - Southwest Airlines Co, American Airlines Group Inc and United Airlines - stood by the aircraft, although many potential passengers took to social media to express concerns, asking if they could change flights or cancel. All 157 people on board died in the crash near the town of Bishoftu, southeast of the capital Addis Ababa.
The plane that crashed on Sunday was less than four months old.
The Airline has set up emergency hotlines for those seeking more information on the flight and those on board.
Do we know how it happened?
Ethiopian Airlines had five of the planes in operation as of the end of January and orders for a further 25, according to Boeing's website. "All evidence is being evaluated in real time and we're considering all potential actions", Garneau posted on Twitter mid-Tuesday.
It has even attracted the attention of US President Donald Trump who expressed the opinion that planes are becoming too complex to fly. In the meantime, the planes remained in the air.
Airlines like Southwest, with a fleet that's almost all some version of 737 models, are drawn to the Max because it's drastically more efficient than existing models and shaves off crucial costs, like fuel.
While the majority of the 50-some carriers operating roughly 350 of the aircraft suspended the model from operations, its largest customers - Air Canada, Southwest Airlines and American Airlines - kept flying the plane. Both carriers said their planes haven't experienced any problems related to the MCAS issue that investigators have focused on in the Lion Air crash.
Southwest Airlines operates the largest USA fleet of Max planes, with 34 Max 8s. It plans to send a technical team to the crash site to help Ethiopian and USA investigators, however, and issued a statement saying it was "deeply saddened to learn of the passing of the passengers and crew" on the Ethiopian Airlines Max airplane.
The Nairobi-bound plane was the same type as the Indonesian Lion Air jet that crashed in October, killing 189 passengers and crew - with some detecting similarities between the two accidents.
He said the pilots were aware of the AD issued after the Lion Air crash in October and had additional training. "That plane is a death trap in air".
By comparison, the Lion Air plane had climbed to nearly 1,600 feet above the ground before it began it's first descent, according to FlightRadar24.
"It's highly suspicious", Mary Schiavo, former Inspector General of the US Transportation Department, told CNN. We are actively engaged with both Boeing and the DGCA and will continue to put safety first, as always.
The president's tweet came as lawmakers were examining the future of the aviation industry during a congressional hearing Tuesday morning.
O'Leary said he was "not particularly" concerned and that he expected the investigation into the crash to have been completed before the first delivery is made. While the cause of the Ethiopia crash remains unknown, investigators have retrieved the black box.
On Monday, India's civil aviation regulator had issued fresh safety directives for operations of this make of aircraft in the country. To London had to be rebooked on flights departing from other Canadian cities.
"It is one of the biggest catastrophes we have had in years", Michael Moller, director-general of the UN Office in Geneva, told the session on Monday.
"We operate 34 MAX 8 aircraft in our fleet of more than 750 Boeing 737s".
On Sunday, "the friends I met at mass said I shouldn't worry because bad news travels fast", she said.
Boeing shares fell 5.6 percent on Monday.