The aircraft in the Ethiopian Airlines disaster, the Boeing 737 Max 8, is a new model that is now the focus of intense scrutiny by aviation safety authorities after two crashes in five months.

The Ethiopian Airlines plane carrying 149 passengers and eight crew crashed on Sunday shortly after takeoff from Addis Ababa Bole International Airport on flight ET302 bound for Nairobi. Eighteen Canadians were killed.

Ethiopian Airlines said it will be gathering information to help with the investigation in collaboration with aircraft manufacturer Boeing Co., the Ethiopian Civil Aviation Authority and an array of international safety entities in the airline sector.

Air Canada, which has 24 Max 8 jets in its fleet, and WestJet Airlines Ltd., which has 13, said they would continue to fly them. But a number of countries took action to ground the aircraft.

Ethiopian Airlines, which has four other 737 Max 8 jets, said it was grounding them as a precaution. China ordered its airlines to suspend their 737 Max 8s, as did Indonesia. Cayman Airways grounded both of its new Max 8 jets temporarily, while India announced a safety review. South Africa’s Comair also grounded its sole Max 8.

In October, 189 people died when a 737 Max 8 flown by Lion Air dived into the Java Sea soon after taking off from Jakarta on a short-haul flight.

The Aviation Safety Network, a website that tracks plane crashes, said the 737 Max 8 in Sunday’s catastrophe was first flown in late October, while the Lion Air plane saw its first flight in July, 2018.

THE BOEING 737 MAX 8 Length: 39.52 metres Some other specifications: Range: 6,570 kilometres Wingspan: 35.9 metres Maximum seats: 210 Engine: LEAP-1B from CFM International THE GLOBE AND MAIL, SOURCES: GRAPHIC NEWS, BOEING THE BOEING 737 MAX 8 Length: 39.52 metres Some other specifications: Range: 6,570 kilometres Wingspan: 35.9 metres Maximum seats: 210 Engine: LEAP-1B from CFM International THE GLOBE AND MAIL, SOURCES: GRAPHIC NEWS, BOEING THE BOEING 737 MAX 8 Length: 39.52 metres Some other specifications: Range: 6,570 kilometres Wingspan: 35.9 metres Maximum seats: 210 Engine: LEAP-1B from CFM International THE GLOBE AND MAIL, SOURCES: GRAPHIC NEWS, BOEING

In addition to Air Canada and WestJet, Sunwing Airlines has four of the planes, according to civil aircraft registrations in Canada.

Air Canada said it has operated the aircraft type since 2017, and hasn’t encountered any major issues. “These aircraft have performed excellently from a … reliability as well as from a safety perspective, and we continue to operate this aircraft as per our schedule,” the Montreal-based carrier said in a statement.

WestJet has relied on variations of the workhorse Boeing 737 since the airline was founded in 1996. “WestJet remains confident in the safety of our Boeing 737 fleet, including our 13 Max 8 aircraft first introduced in 2017,” the Calgary-based carrier said in a statement. “WestJet has flown five different variants of the Boeing 737 since 1996, and the fleet currently operates around 450 safe daily B737 departures.”

Both Air Canada and WestJet expressed their condolences to family and friends affected by Sunday’s tragedy in Ethiopia.

“We are monitoring the situation closely and will not speculate on the cause of the incident,” WestJet added.

Boeing said it is part of the support team that is examining what went wrong: “A Boeing technical team will be travelling to the crash site to provide technical assistance under the direction of the Ethiopia Accident Investigation Bureau and U.S. National Transportation Safety Board.”

On Sunday night, Boeing said it is cancelling the debut event of a new 777X aircraft that was set for March 13 in light of the crash.

Driven by orders from Air Canada, WestJet and other carriers, the Boeing 737 Max is the fastest-selling aircraft in Boeing’s history, Boeing said, with more than 5,000 orders from some 100 customers.

The narrow-body 737 model has flown since 1967, updated several times. The Max 8 version, assembled at Boeing’s plant in Renton, Wash., can fly further, using less fuel than its predecessors. The two-engine, single-aisle plane carries as many as 210 passengers, depending on the seat configuration.

In the Lion Air crash on Oct. 29, a preliminary report from Indonesian investigators found there were several technical problems recorded in the plane’s maintenance log in the days before the fatal crash. Airspeed and altitude displays contained errors, and a sensor that measures the wing angle was replaced a day before. In the flight before the crash, the crew reported that instrument failures caused control problems.

On the Indonesian flight, the plane’s automatic anti-stalling feature repeatedly pushed down the plane’s nose and forced the pilots to correct the move manually. Shortly before radio contact with the plane was lost, the crew reported they could not read the plane’s altitude.

Air Canada added 18 of the 737 Max 8s to its fleet in 2018 and will take delivery of another 18 in 2019, according to company documents. By 2021, Air Canada will fly 50 of the 737 Max 8s, forming one-third of its narrow-body fleet.

Air Canada has deployed the 737 Max 8 as a replacement for the Airbus A320, reducing operating costs. Canada’s largest carrier uses the plane on routes such as Vancouver-Calgary and longer domestic flights such as Vancouver-Montreal, as well as transborder trips into the United States. The Max 8 is also available for overseas flights such as those between Atlantic Canada and London.

In December, an Air Canada 737 Max 8 bound for Hawaii was forced to return to Vancouver owing to mechanical problems.

With reports from Reuters