United Airlines released its first quarter earnings on Tuesday in which it indicated that it lost about $200 million due to the temporary grounding of the Boeing 737 Max 9 earlier this year. The Chicago-based airline announced that it had a pre-tax loss of$164 million for the quarter, which was an improvement of $92 million from the same quarter a year ago, and noted that the loss was caused by the 737 Max 9 grounding."These earnings reflect the approximately$200 million impact from the Boeing 737 Max 9 g ...