American Airlines had roughly 85 flights a day on the Boeing Max 8 and Max 9 jets.
A Lion Air Max plane crashed on Oct 29, souring relations with Boeing after the manufacturer pointed to maintenance issues and human error as the underlying cause, even though the flights pilots had been battling a computerized system that took control following a sensor malfunction.
Hours later, U.S. President Donald Trump announced an emergency order grounding all Boeing 737 Max 8 and Max 9 aircraft in that country, effectively closing the skies to the more than 375 Max 8s now in service across the globe.
Boeing said it supports the grounding of its planes as a precautionary step, while reiterating its "full confidence" in the safety of the 737 Max.
All Boeing 737 Max-8 and 9 planes will continue to be grounded until May after the catastrophic Ethiopian Airlines crash, the US Federal Aviation Administration said.
Sunday's crash of a passenger jet en route from Addis Ababa to Nairobi killed all 157 people on board.
As of Tuesday night, only Canada and the US had not grounded the aircraft following Sunday's plane crash just minutes after takeoff from Addis Ababa in Ethiopia.
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John Vandemoer, a former Stanford University sailing coach who worked with Singer, also pleaded guilty to racketeering conspiracy. Parents spent anywhere from $200,000 to $6.5 million to guarantee their children's admission, officials said.
While aviation experts warn against drawing conclusions until more information emerges from the crash investigation, numerous jurisdictions, including China, Germany, the United Kingdom and the European Union, banned the plane model from their airspace before Canada and the USA did.
"We believe investors were pricing in very limited risk to the 737 ramp-up profile, which now has greater risk within the wide range of possible outcomes following these incidents", Mr. Poponak said in a research note.
On Tuesday, the Dallas Morning News reported that several months before the Ethiopian Airlines crash, pilots had "repeatedly voiced safety concerns" about the Max 8 to USA authorities.
Garneau says the decision was made after a review of evidence about the aircraft and means none of the aircraft can fly into, out of or over Canada. "Air Canada Component of CUPE always believes that the safety of passengers and crew must come first", said president Wesley Lesosky.
"It's normal that the media have seized upon yesterday's tragedy involving Ethiopian Airways, since the 737 Max is a new aircraft model and was recently involved in another air accident", the committee wrote. A total of 18 Canadians were killed in the latest crash.
Garneau told reporters he informed Canada's airlines Wednesday morning of his decision, and there was no push back from the air carriers. Eastern time to include additional information and quotes from Garneau, Air Canada, the pilots association and the flight attendants union.