A stunning week, beginning with the second crash of a Boeing 737 MAX and, three days later, every single MAX is grounded—and the US was last to make that call.

The FAA, relying on refined satellite tracking data and new physical evidence that more closely links two crashes of Boeing 737 MAX 8s, grounded Boeing’s newest narrowbody March 13, with immediate effect.

A McDonnell Douglas MD-83 belonging to Taiwanese carrier Far Eastern Air Transport (FAT) was involved in a runway excursion after landing at Philippines’s Kalibo International Airport on the evening of March 13.

News this morning that Canada has grounded the Boeing 737 MAX is highly significant and truly leaves the US isolated on this issue.

Canadian regulators—citing satellite tracking data that suggest the flight profile of the Ethiopian Airlines 737 MAX that crashed March 10 is similar to that of last October’s Lion Air MAX 8 accident—has banned all MAX operations in Canada until further notice.

European operators are replacing grounded Boeing 737 MAXs with other aircraft in their fleets as well as looking to lease additional capacity following a ban on operating the type in the region.

The Association of Asia Pacific Airlines (AAPA) is urging for more clarity in a timely manner from FAA and Boeing on the proposed modifications on the Boeing 737 MAX so that regulators and airlines can make sound judgments and instill confidence.

The FAA is pressing on with planned changes to Boeing 737 MAX aircraft stemming from the October 2018 Lion Air flight JT610 crash, but has not seen evidence from the recent Ethiopian Airlines MAX 8 crash to take additional steps, such as the precautionary groundings around the globe.