PORTLAND, Ore. (AP) — United Airlines said Monday it found loose bolts and other “installation issues” on a part of some Boeing 737 Max 9<a class="excerpt-read-more" href="https://wsvn.com/news/us-world/united-airlines-found-loose-bolts-other-issues-on-a-key-part-of-grounded-boeing-737-max-9-jetliners/">Read More</a>