Boeing says it hopes its grounded 737 MAX aircraft will fly again before the end of the year.
The jet was taken out of action in March after two fatal crashes - involving Lion Air and Ethiopian Airlines flights - which killed a total of 346 people.
The company says it is working with regulators to get approval to resume flights after developing software updates.
An exact date for resuming flights will depend on the regulation process, but Boeing says they are working on the assumption that will happen in the fourth quarter of this year.
Boeing CEO Dennis Muilenberg said: "Our top priority remains the safe return to service of the 737 MAX, and we're making steady progress.
"We've also taken action to further sharpen our company's focus on product and services safety, and we continue to deliver on customer commitments and capture new opportunities with our values of safety, quality and integrity always at the forefront."
The firm says it's also planning to ramp up production of the 737 by late 2020.
It comes as the company announced its third quarter financial results, showing a 21% decline in revenues compared to the same period last year.
The firm says the factors for the decline in revenue include "lower 737 deliveries".
737 MAX aircraft have now been grounded for more than seven months.
Last week, the US Federal Aviation Administration (FAA) confirmed Boeing had alerted officials to the existence of "instant messages between two Boeing employees, characterising certain communications with the FAA during the original certification of the 737 MAX in 2016".
According to the New York Times, the messages revealed that a top pilot working on the plane had raised concerns about an automated system (known as MCAS) which has been a key focus of investigations into the two fatal 737 MAX crashes.
The FAA said it found the "substance of the document concerning", and also expressed disappointment that Boeing didn't alert authorities to the messages' existence when they were initially discovered "some months ago".