A Boeing 737 Max airplane is pictured on the tarmac at Dallas Fort Worth Airport following a media flight to Tulsa, Oklahoma in Dallas, Texas, U.S., December 2, 2020. (REUTERS/Carlo Allegri)

In another display of confidence, European budget airline Ryanair was set to place a hefty order for up to 75 additional 737 MAX jets, industry sources said.

Wednesday’s American Airlines 737 MAX flight was a 45-minute hop from Dallas, Texas, to Tulsa, Oklahoma. It comes weeks before the first commercial passenger flight on Dec. 29, and is part of a public relations effort to allay any concerns about the aircraft.

Boeing’s best-selling jet was grounded in March 2019 after two crashes in five months killed a combined 346 people, marking the industry’s worst safety crisis in decades and undermining US aviation regulatory leadership.