I thought they were grounded - not so?
As far as carrying passengers, yes. Southwest was moving this to it's California central facility, with only the flight crew. Engine issue totally unrealated.
Boeing is also flying the MAX out of Renton to other sites like Boeing Field or Moses Lake where they are painted and parked until ready to hand over the keys. And that should be sooner than you think, with software upgrades ready for installation. Airlines are meeting with Boeing tomorrow to discuss the next steps.