Irish low-cost carrier Ryanair is set to exercise an option to order up to 75 additional Boeing 737 MAX aircraft.

If it takes place, the deal will bring the European budget carrier’s MAX order to as much as 210 aircraft, Reuters reported.

The news follows the publication of the final approval of the modified 737 MAX in the Federal Register by the US Federal Aviation Administration (FAA) late last month.

Since March last year, the aircraft has been temporarily grounded following two fatal crashes in Indonesia and Ethiopia that killed a total of 346 people.

Meanwhile, reports emerged saying that Boeing has completed the first post-grounding flight for 737 MAX on 2 December to validate the safety of the redesigned jet.

American Airlines 737 MAX flight flew for 45 minutes from Dallas, Texas, to Tulsa, Oklahoma in the US with media onboard.

Captain Pete Gamble said: “The history of aviation is built around a chain of safety.

“When the chain of safety breaks, it’s up to those of us in the industry to mend it and bring it back.”

In addition, several other regulators have started their process to approve the aircraft for reoperations after revisions to cockpit software and pilot training.

Last month, the European Union Aviation Safety Agency (EASA) started its preparation to return grounded Boeing 737 MAX aircraft to service.

UAE civil aviation regulator General Civil Aviation Authority (GCAA) also revealed its plan to bring the grounded Boeing 737 MAX back to service.