Hong Kong, June 11 -- Boeing's 737 MAX will certainly fly again in commercial operations. When that will be depends on approval of software updates to the anti-stall system alleged to be responsible for the fatal Lion Air and Ethiopian Airlines crashes by regulators around the world and airlines flying the aircraft.

In its latest update, Boeing said it had completed development of the update, associated simulator testing and its engineering test flight. Company crews had flown the updated software on the MAX for more than 360 hours on 207 flights, it announced.

"We are now providing additional information to address Federal Aviation Administration (FAA) requests that include additional detail on how pilots interact with the airplane contr...