Ryanair has ordered an additional 75 Boeing 737 Max aircraft, despite the model still not having been approved to fly in Europe.
The 737 Max has been grounded since March 2019 following two fatal crashes in the space of five months, killing 346 people.
Boeing has been working for the best part of two years on a software fix for the aircraft, as well as new pilot training.
It has been provisionally approved for a return to service in the US, and made its first test flight with non-technical or Boeing passengers onboard – mainly media – on Thursday (3 December).
Ryanair already had 125 737 Maxs on order when the aircraft was grounded, and has now increased its order to 210, with the order now worth in excess of $22 billion (£16 billion).