Mitsubishi Aircraft Corp. has signed a deal with Eastern Air Lines Group Inc. of the United States to supply up to 40 of its MRJ regional jet under development, Teruaki Kawai told reporters at the Farnborough International Airshow underway in a London suburb.

The Miami-based airline, attempting a comeback under a new owner, is placing a firm order for 20 MRJ90, a 90-seat class plane, and an option to buy 20 more under a memorandum of understanding.

A definitive agreement is expected in the near future, with deliveries scheduled to start in 2019, the Japanese aircraft builder said.