WASHINGTON (Reuters) - The outgoing U.S. transportation secretary said on Monday that Boeing has more to do and its efforts to improve its culture are unfinished after a door panel missing four key bolts flew off a new Alaska Airlines 737 MAX 9 in mid-air in January 2024.

"There were real deficiencies ... there is much more to do," Pete Buttigieg told Reuters in an interview. "I think the culture change at Boeing is something that is a real work in progress and the only way to fully assess it will be to see they can consistently improve results."