Last October, a 737 MAX 8 operated by Indonesian carrier Lion Air fell into the Java Sea just shortly after takeoff, taking all 189 lives on board. Ethiopia, China and Indonesia were among the countries that were quick to ground Boeing 737 MAX 8 planes with regard to safety concerns.

In the meantime, airlines followed suit like Ethiopian Airlines and Cayman Airways. Flight attendants and members of the public took to Twitter to voice their concerns or request to change flights involving Boeing 737 MAX 8 planes.

“Safety is our number one priority and we are taking every measure to fully understand all aspects of this accident, working closely with the investigating team and all regulatory authorities involved,” Boeing said in a statement. “The investigation is in its early stages, but at this point, based on the information available, we do not have any basis to issue new guidance to operators.”

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