The 737 Max has been grounded worldwide since mid-March following two fatal crashes involving the aircraft in just five months.
Lion Air flight 610 came down in the Java Sea shortly after taking off from Jakarta in October 2018. All 189 people onboard were killed. Then in March, Ethiopian Airlines flight 302 crashed en route to Nairobi from Addis Ababa, killing all 157 people onboard.
Initial investigations into both incidents found the same deep-seated flight control system to have been active when the two aircraft crashed.
