A US aviation regulator has revealed that Boeing needs to do more work to fix the ill-fated 737 MAX jetliners before the authority re-approves it.
Airlines across the globe grounded their 737 MAX jetliners following two fatal incidents that left hundreds of passengers dead.
Media reports quoted a Federal Aviation Administration (FAA) official as saying on Monday that more work needed to be done on the plane’s software.
The FAA, signaling Boeing’s proposed changes to the anti-stall system after the deadly crashes, said the changes were still not adequate and expected Boeing to submit the plan “over the coming weeks” following more work, an FAA spokesman said, adding, "The FAA will not approve the software for installation until the agency is satisfied with the submission.”
Once Boeing's submission is completed, FAA is expected to conduct a review of the updated flight-control system. Until then, all Boeing 737 Max jetliners delivered to different airlines will remain grounded.
The giant US aviation company was prompted to stop its new deliveries of the jetliner after two of the MAX jetliners crashed leaving 246 fatalities.
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There were 371 of the planes in operation worldwide at the time of the Ethiopian crash, and nearly 5,000 more on order at $121 million a plane.
Norwegian Airlines has already said it will seek compensation from Boeing for being forced to ground its MAX jetliners, and various companies are re-considering orders.