Boeing chief executive Dennis Muilenburg was to appear Tuesday and Wednesday before US lawmakers who want to know among other things if Boeing cut corners to rush the MAX out to compete with the Airbus A320neo models. "The fuel-efficient A320neo family aircraft will allow IndiGo to maintain its strong focus on lowering operating costs and delivering fuel efficiency with high standards of reliability," Riyaz Peermohamed, Chief Aircraft Acquisition and Financing Officer of IndiGo, said in a statement.

IndiGo is already the largest operator of Airbus's latest-generation single-aisle model, which have become a top seller as they offer airlines considerable savings in fuel, one of their biggest costs. The airline currently operates 97 of the planes. Including the 300 ordered on Tuesday, it has ordered a total of 730 of the medium-range models.

India's market for aircraft is growing fast. The number of passengers there has multiplied by six over the past decade as middle class travellers take advantage of better connections and cheaper flights. "We are pleased to see our aircraft allowing IndiGo to take full advantage of the predicted growth in Indian air travel," Airbus chief executive Guillaume Faury was quoted by a statement as saying.

Copyright Agence France-Presse, 2019