All Boeing 737 Max 8 and 9 aircraft will remain grounded at least until May after the fatal Ethiopian Airlines crash on Sunday, the US Federal Aviation Administration (FAA).
The aircraft will not fly until a software update can be tested and installed.
Monday’s crash, shortly after take‑off from Addis Ababa, killed 157 people from 35 nations.
It was the second crash involving a 737 Max in six months.
Some people have pointed to similarities between the incidents, with some experts citing satellite data and evidence from the crash scene as showing links between Sunday's disaster and October's crash in Indonesia of the Lion Air jet that killed 189 people.
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