Boeing 737 MaxImage copyrightGetty Images

Boeing has completed development of a software update for its 737 Max plane which was grounded following two fatal crashes within five months.

The US firm announced that it had flown the 737 Max with the updated software on 207 flights.

It added it would provide data to the Federal Aviation Administration (FAA) on how pilots interact with controls and displays in different scenarios.

The FAA expects Boeing to submit the upgrade for certification next week.

An Ethiopian Airlines flight crashed in March, killing all 157 people on board.