The order, announced Tuesday at the Paris Air Show, came just three weeks after Vietjet doubled its firm orders of Airbus widebodies.

The partnership will focus on work toward future engine iterations, including potential powerplants for ATR’s planned EVO hybrid-electric aircraft family.

The carrier signed a memorandum of understanding (MoU) with hydrogen propulsion specialist Conscious Aerospace at the Paris Air Show.

The purchase agreement marks a new type for the African carrier’s fleet.

The agreements will see the entry of two new aircraft types into the Japanese airline’s fleet.

Norwegian is working to secure long-term financing for the transaction.

Over 30 organizations, including Air France-KLM, SAS and easyJet, have called on EU governments to fund an electro-sustainable aviation fuel trial auction.

The airline, Safran and UK design agency Acumen Design Associates said the new design will be the world’s largest seat in its class on a mid-sized aircraft.