Mubasher: Boeing’s 737 Max jet will fly again by December, after being grounded since March against a backdrop of two fatal crashes in just five months, Bloomberg reported, citing a senior US regulator said.

While the Federal Aviation Administration (FAA) is “under a lot of pressure,” the Max will be returned to service “when we believe it will be safe,” FAA safety official Ali was quoted by the news outlet.

As progress is still being made on safety fixes to the embattled aircraft, it is not possible to provide an exact date, Bahrami said in an interview at an aviation safety conference in Cologne.

Boeing is finishing a software fix for flight-control system malfunction in its most popular model, following two fatal crashes involving Indonesia’s Lion Air and Ethiopian Airlines, killing collective 346 people.

Countries, including China, Indonesia and Ethiopia, and a range of airlines, suspended flight operations of the 737 Max.