The United States and many other countries have grounded the Max 8s as the US -based company faces the challenge of proving the jets are safe to fly amid suspicions that faulty sensors and software contributed to the two crashes that killed 346 people in less than six months.
Boeing said it supports the grounding of its planes as a precautionary step, while reiterating "full confidence" in their safety.
The grounding of Boeing's 737 Max jets after the crash in Ethiopia has had no immediate financial impact on airlines using the planes, but it will get painful for the industry the longer they do not fly, companies and analysts said on Friday. The crash in Ethiopia was the second fatal accident involving the airplane in five months, following the October 2018 disaster in Indonesia that killed 189.
Air Canada has 24 Boeing 737 Max 8 aircraft out of 184 narrow-body planes in its fleet.
France's Bureau of Enquiry and Analysis for Civil Aviation Safety (BEA) said on Saturday that its experts had downloaded data from the cockpit voice recorder (CVR) of the Boeing 737 MAX 8 aircraft that crashed minutes after takeoff from Addis Ababa last week. US pilot unions said their pilots were aware of the software issue and knew how to overcome it.More news: Fears for Paris Jackson amid reports of hospitalisation
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Investigators are getting a clearer picture of how Ethiopian Airlines flight 302 was in trouble nearly from the beginning of its brief final flight. Already, some investigative information has leaked.
There are 74 registered in the United States and 387 in use worldwide with 59 carriers, according to the FAA.
No more than two minutes later, the air traffic controller was in communication with other aircraft when the voice from Ethiopian Airlines flight 302 interrupted, saying "break, break" - signalling that other nonurgent communications should cease.
The Ethiopian Airlines pilots reported similar difficulties before their aircraft plunged to the ground. But airlines are scrambling to put passengers on other planes to prevent major disruption to air travel. Shortly after their takeoffs, both crews tried to return to the airports but crashed. "Request vector (direction) for landing".
Ethiopian Airlines CEO Tewolde GebreMariam said the doomed flight's captain was an experienced aviator with more than 8,000 flight hours.