New York CNN — United Airlines was pushed into the red by Boeing and its ongoing quality issues, the airline said Tuesday. The company took a $200 million hit in the first quarter after the Boeing 737 Max 9 was grounded following the door plug incident aboard an Alaska Airlines flight. United did not say whether or not it expects to be reimbursed by Boeing for the cost of the grounding of its 737 Max 9s for three weeks following the January 5 incident. But it did say that it would have been prof...