Boeing said on Sunday it will have to do more work on about 50 undelivered 737 MAX airplanes, potentially delaying some near-term deliveries, after its supplier Spirit AeroSystems Boeing, which has been under fire from regulators and airlines since the Jan 5 blowout of a door plug on a 737 MAX 9, said safety was unaffected and existing 737s could keep flying. two mis-drilled holes on some fuselages.
