Boeing has said it expects its troubled 737 Max aircraft to return to the skies before the end of the year.
The jet was grounded after two fatal crashes, including last year’s Lion Air disaster which killed 189 people.
Just hours after Indonesian investigators blamed mechanical and design problems for the crash, Boeing said it had developed software updates.
The investigators focused on a system used to improve handling and prevent stalling on the Boeing 737 Max.
Why did the Lion Air plane crash?
The official report by the Indonesian authorities into the disaster, which occurred 13 minutes after take-off from Jakarta on 29 October 2018, is expected to be published on Friday.
But on Wednesday, the authorities informed the victims’ families of the findings.
Boeing did not comment ahead of formal publication of the report. But according to the information provided to the families, mechanical and design problems with the flight control system were among the causes of the crash.
The report highlighted issues with the MCAS (Manoeuvring Characteristics Augmentation System), which was designed to make the aircraft easier to fly.